- Abies alba, European Silver-fir;Abies pectinata Dc non Poir;Pinus lucida Salisb nom illegit;Pinus pectinata Lam nom illegit;Pinus picea L;Silver fir;European fir
- Abildgaardia ovata, Fimbristylis ovata Burmf JKern;Carex ovata Burmf;Cyperus monostachyos L;Abildgaardia monostachya L Vahl;Iria monostachya L Kuntze;Fimbristylis monostachya L Hassk;Flatspike sedge;Fimbristylis monostachya;Carex ovata;Iria monostachya;Cyperus monostachyos;Abildgaardia monostachya;Fimbristylis ovata
- Acacia pennata, Mimosa pennata L
- Acaciella glauca, Mimosa glauca L;Acacia glauca L Moench;Acaciella curassavica Britton & Killip;Acacia curassavica Britton & Killip Stehle
- Acanthocereus tetragonus, Acanthocereus pentagonus L Britton & Rose;Cactus pentagonus L;Cereus pentagonus L Haw;Triangle cactus;Acanthocereus pentagonus
- Aceras anthropophorum, Man Orchid;Ophrys anthropophora L;Orchis anthropophora (L) All
- Acetosa vesicaria, Rosy Dock;Bladder Dock;Pink Dock;Wild Hops;Rumex vesicarius L;Rumex clementii Domin
- Acetosella vulgaris, Sorrel, Sheep Sorrel;Red Sorrel;Horse Sorrel;Field Sorrel;Sour Dock;Rumex acetosella L;Rumex acetosella var alpha vulgaris WDJKoch;Rumex pyrenaicus Pourr ex Lapeyr;Rumex acetosella subsp pyrenaicus Pourr ex Lapeyr Akeroyd
- Acinos arvensis, Basil Thyme;Clinopodium acinos;Calamintha acinos (L) Clairv;Thymus acinos L;Basil thyme;Satureja acinos;Acinos thymoides (L) Moench;Calamintha acinos (L) Clairville ex Gaudich;Clinopodium acinos (L) Kuntze;Satureja acinos (L) Scheele
- Acroptilon repens, Russian Knapweed;Centaurea repens L;Hardheads;Centaurea repens
- Actinostachys digitata, Acrostichum digitatum L;Schizaea digitata L OSchwarz
- Adenocarpus complicatus, Spartium complicatum L
- Adenostemma lavenia, Sticky dasiy;Verbesina lavenia L;Adenostemma viscosum JRForst & GForst;Adenostemma viscosa orth var JRForst & GForst sensu Forster, JR & Forster, JG 1776;Common medicineplant
- Aegiceras corniculatum, Mangrove;River Mangrove;Black Mangrove;River mangrove;Horned Mangrove;Rhizophora corniculata L;Aegiceras majus Gaertn;Aegiceras fragrans KDKoenig
- Aegle marmelos, Crateva marmelos L
- Aeonium arboreum, Sempervivum arboreum L;Tree Aeonium;Tree aenium
- Aerva lanata, Achyranthes lanata L
- Aeschynomene indica, Budda Pea;Jointvetch;Aeschynomene pumila L;Hedysarum alpinum Lour;Hedysarum virginicum Lour;Aeschynomene diffusa Klein ex Willd;Aeschynomene viscidula Roxb ex Willd;Aeschynomene glaberrima Poir;Aeschynomene macropoda Dc;Aeschynomene subviscosa Dc;Aeschynomene roxburghii Spreng;Aeschynomene quadrata Schum & Thonn;Aeschynomene punctata Steud;Aeschynomene montana Span;Aeschynomene cachemiriana Cambess;Aeschynomene kashmiriana orth var Cambess sensu Cambessedes, J 1841;Aeschynomene oligantha Welw ex Baker;Indian jointvetch;Indian Jointvetch
- Aetheorhiza bulbosa, Tuberous Hawks-beard;Leontodon bulbosus L
- Agathosma crenulata, Diosma crenulata L
- Agrimonia procera, Fragrant Agrimony;Agrimonia odorata auct, non (L) Mill;Agrimonia repens sensu De Langhe et al, non L
- Agrostis canina, Velvet Bent;Agrostis canina canina fascicularis;Agrostis canina subsp canina L;Velvet bentgrass
- Ajuga chamaepitys, Ground-pine;Teucrium chamaepitys L;Yellow bugle
- Ajuga iva, Teucrium iva L;Ajuga pseudoiva Robill & Castagne ex Dc
- Albizia lebbeck, Indian Siris;Siris Tree;Raintree;Broome Rain Tree;Powder-puff Tree;Mimosa lebbeck L;Acacia lebbeck L Willd;Feuilleea lebbeck L Kuntze;Albizia latifolia Boivin;Womans tongue;Womans Tongue Tree
- Alcea rosea, Hollyhock;Alcea ficifolia L;Althaea rosea (L) Cav;Althaea rosea
- Alchemilla monticola, Alchemilla crinita auct, non Buser;Alchemilla xanthochlora;Alchemilla gracilis Opiz;Alchemilla pastoralis Buser;Hairy ladys mantle;Alchemilla vulgaris;Hairy Ladys Mantle;Alchemilla pratensis auct non FW Schmidt;Alchemilla vulgaris auct non L;Alchemilla xanthochlora auct non Rothm
- Aleurites moluccanus, Candlenut Siris;Candlenut;Candle Nut;Candle-nut Tree;Jatropha moluccana L;Dryandra oleifera Lam;Dryandra vernicia Correa;Aleurites trilobus JRForst & GForst;Aleurites triloba orth var JRForst & GForst sensu Forster, JR & Forster, JG 1776
- Alhagi maurorum, Camelthorn;Camel Thorn;Hedysarum alhagi L;Hedysarum pseudalhagi MBieb;Alhagi pseudalhagi Desv sensu Desvaux, NA 1813;Alhagi pseudalhagi MBieb Desv ex BKeller & Shap;Alhagi camelorum Fisch;Camel-thorn
- Allium schoenoprasum, Chives;Allium sibiricum L;Wild chives;Chive
- Allophylus cobbe, Allophyllus cobbe orth var L Blume;Rhus cobbe L;Allophylus ternatus GForst Radlk;Allophyllus ternatus orth var GForst Radlk;Ornitrophe serrata Roxb;Allophyllus crenatus orth var Radlk;Allophylus crenatus Radlk
- Alloteropsis cimicina, Milium cimicinum L;Panicum cimicinum L Retz;Axonopus cimicinus L PBeauv;Urochloa cimicina L Kunth;Axonopus maidenianus Domin;Eriachne melicacea var fragrans FMBailey;Summergrass
- Alnus glutinosa, Black Alder;Common Alder;Betula alnus var glutinosa L;European alder
- Alnus incana, Grey Alder;Betula alnus var incana L;Gray alder;Speckled Alder;Alnus hirsuta;Alnus rugosa;Alnus tenuifolia
- Alocasia macrorrhizos, Spoon Lily;Cunjevoi;Arum macrorrhizon L;Alocasia indicum Lour Spach;Arum indicum Lour;Giant taro
- Aloe vera, Aloe perfoliata var vera L;Aloe barbadensis Mill;Barbados aloe
- Alopecurus myosuroides, Black Twitch;Blackgrass;Slender Foxtail;Alopecurus agrestis L;Black-grass;Slender meadow foxtail
- Alstonia scholaris, Milky Pine;White Cheesewood;Milky Bean;Milkwood;White Pine;Echites scholaris L
- Alternanthera brasiliana, Gomphrena brasiliana L;Gomphrena dentata Moench;Alternanthera dentata Moench Scheygr;Brazilian joyweed;Gomphrena brasiliana;Achyranthes brasiliana;Alternanthera dentata;Alternanthera ramosissima
- Alternanthera ficoidea, Gomphrena ficoidea L
- Alternanthera pungens, Khaki Weed;Khaki-weed;Achyranthes repens L;Illecebrum achyrantha L;Alternanthera echinata Sm;Alternanthera achyrantha var echinata Sm Maiden;Alternanthera achyrantha var leiantha Seub;Khakiweed;Achyranthes leiantha (Seub) Standl;Alternanthera achyrantha (L) R Br ex Sweet;Alternanthera repens (L) Link, non JF Gmel
- Alternanthera sessilis, Alternanthera triandra Lam;Gomphrena sessilis L;Rabbit-meat;Sessile joyweed;Gomphrena sessilis;Achyranthes sessilis;Sessile Joyweed;Achyranthes sessilis (L) Desf ex Steud;Alternanthera glabra Moq
- Alysicarpus bupleurifolius, Sweet Alys;Hedysarum bupleurifolium L
- Alysicarpus vaginalis, Wire Grass;Alyce Clover;Buffalo Clover;Hedysarum vaginale L;White moneywort;Hedysarum vaginale;White Moneywort
- Alyssum alyssoides, Clypeola alyssoides L;Clypeola campestris L;Alyssum calycinum L;Small Alison;Pale madwort
- Amaranthus blitum, Amaranthus lividus L;Amaranthus lividus L subsp lividus;Amaranthus ascendens Loisel;Amaranthus oleraceus L;Amaranthus lividus var ascendens Loisel Hayw & Druce;Amaranthus lividus subsp ascendens Loisel Heukels;Amaranthus lividus L var lividus;Guernsey Pigweed;Purple amaranth;Amaranthus lividus;Purple Amaranth
- Amaranthus cannabinus, Tidalmarsh Amaranth;Acnida cannabina L
- Amaranthus cruentus, Redshank;Amaranthus paniculatus var cruentus L Moq;Amaranthus hybridus subsp cruentus L Thell;Amaranthus hybridus var cruentus L Mansf;Amaranthus paniculatus L;Purple Amaranth;Amaranthus hybridus subsp cruentus (L) Thell;Amaranthus hybridus subsp incurvatus (Timeroy ex Gren & Godr) Brenan;Red amaranth
- Amaranthus tricolor, Josephs Coat;Amaranthus melancholicus L;Tampala;Josephs-coat;Hum hien
- Ambrosia artemisiifolia, Ragweed;Ambrosia elatior L;Annual ragweed;Rgweed
- Ammi visnaga, Daucus visnaga L;Toothpick-plant;Toothpickweed
- Ammophila arenaria, Marram Grass;Marram-grass;Arundo arenaria L;Ammophila arundinacea Host;Psamma arenaria L Roem & Schult;Marram;European beachgrass
- Anacamptis pyramidalis, Pyramidal Orchid;Orchis pyramidalis L
- Anagallis minima, Chaffweed;Centunculus minimus L
- Anagallis tenella, Bog Pimpernel;Lysimachia tenella L
- Ananas comosus, Pineapple;Ananas sativus Schultf;Bromelia comosa L;Bromelia ananas L;Ananas sativus;Bromelia comosa
- Anaphalis margaritacea, Pearly Everlasting;Gnaphalium margaritaceum L;Western pearly everlasting
- Anchusa arvensis, Wild Bugloss;Lycopsis arvensis L;Small bugloss
- Anisomeles indica, Anisomeles ovata RBr;Nepeta indica L
- Anisomeles malabarica, Nepeta malabarica L;Epimeredi malabaricus L Rothm;Epimeredi malabarica orth var BJConn sensu Conn, BJ 1992;Anisomeles moschata RBr;Anisomeles salviifolia var moschata RBr Domin;Epimeredi salviifolia orth var BJConn sensu Conn, BJ 1992;Epimeredi moschatus RBr Rothm;Epimeredi salviifolius RBr Rothm;Epimeredi salviaefolius orth var Rothm sensu Rothmaler, WHP 1944;Anisomeles salviifolia var typica Domin sensu Domin, K 1928;Anisomeles salviifolia RBr var salviifolia;Anisomeles salvifolia orth var Benth sensu Bentham, G 1870;Anisomeles salviifolia RBr
- Anogramma leptophylla, Annual Fern;Delicate Rue Fern;Gymnogramma leptophylla L Desv;Polypodium leptophyllum L;Asplenium leptophyllum L Sw;Acrostichum leptophyllum L Lam & Dc;Grammitis leptophylla L Sw;Pityrogramma leptophylla L Domin;Gymnogramma novae-zelandiae Colenso;Riccia tuberosa Taylor
- Antennaria dioica, Mountain Everlasting;Antennaria dioica var dioica (L) Gaertn;Antennaria dioica var hyperborea (Don) Dc;Antennaria hibernica Braun-Blanq;Gnaphalium dioicum L;Stoloniferous pussytoes
- Anthriscus cerefolium, Garden Chervil;Scandix cerefolium L;Garden chervil
- Anthriscus sylvestris, Wild chervil;Cow Parsley;Chaerophyllum sylvestre L
- Antidesma bunius, Wild Cherry;Currantwood;Currant Tree;Herbert River Cherry;Stilago bunius L;Antidesma dallachyanum Baill;Antidesma dallachyi orth var FMuell;Antidesma sinuatum Benth
- Apera interrupta, Dense Silky-bent;Agrostis interrupta L;Dense silkybent
- Apera spica-venti, Loose Silky-bent;Agrostis spica-venti L;Loose silkybent
- Aphyllodium biarticulatum, Hedysarum biarticulatum L;Dicerma biarticulatum L Dc;Dicerma biarticulatum L Dc subsp biarticulatum;Dicerma biarticulatum L Dc f biarticulatum;Dicerma biarticulatum f genuinum Schindl;Echinolobium biarticulatum L Desv;Desmodium biarticulatum L FMuell;Desmodium biarticulatum L FMuell var biarticulatum;Meibomia biarticulatum L Kuntze;Desmodium novae-hollandiae Domin;Desmodium novae-hollandiae Domin var novae-hollandiae;Desmodium novae-hollandiae Domin f novae-hollandiae;Desmodium novae-hollandiae var typicum Domin;Desmodium novae-hollandiae f latifolium Domin;Desmodium biarticulatum var australiense Schindl Meeuwen;Dicerma biarticulatum subsp australiense Schindl HOhashi;Aphyllodium australiense Schindl HOhashi
- Apium inundatum, Lesser Marshwort;Sison inundatum L
- Apium nodiflorum, Fools-water-cress;Sium nodiflorum L;European marshwort
- Aquilegia pyrenaica, Pyrenean Columbine;Aquilegia alpina auct, non L
- Arabidopsis lyrata, Northern Rock-cress;Arabis petraea;Cardamine petraea L;Cardaminopsis petraea (L) Hiitonen
- Arabidopsis thaliana, Common Wallcress;Thale Cress;Sisymbrium thalianum L Gaudin;Arabis thaliana L;Sisymbrium thalianum (L) J Gay;Mouseear cress
- Arabis glabra, Tower Mustard;Turritis glabra L;Tower rockcress;Turritis glabra
- Arabis hirsuta, Hairy Rock-cress;Arabis brownii Jord;Turritis hirsuta L;Hairy rockcress
- Arctostaphylos uva-ursi, Bearberry;Arbutus uva-ursi L;Kinnikinnick
- Arctotheca calendula, African Marigold;Cape Dandelion;Capeweed;Cape Weed;Arctotis calendula L;Cryptostemma calendula L Druce;Arctotis tristis L;Cryptostemma triste L Domin;Arctotis calendulacea L;Cryptostemma calendulacea L RBr;Arctotheca calendulacea KLewin;Cryptostemma calendulaceum orth var RBr sensu Brown, R 1813;Plain Treasureflower
- Aremonia agrimonioides, Bastard Agrimony;Agrimonia agrimonioides L
- Arenaria ciliata, Fringed Sandwort;Arenaria ciliata ciliata hibernica;Arenaria ciliata subsp ciliata L;Arenaria ciliata subsp hibernica Ostenf & OC Dahl
- Argentina anserina, Silverweed;Potentilla anserina;Silverweed cinquefoil;Silverweed Cinquefoil;Argentina argentea (L) Rydb;Potentilla anserina L;Potentilla yukonensis Hultn
- Argyranthemum frutescens, Marguerite;Chrysanthemum frutescens L;Paris Daisy
- Arisarum proboscideum, Mousetailplant;Arum proboscideum L
- Armoracia rusticana, Horse-radish;Armoracia lapathifolia Gilib nom inval;Cochlearia armoracia L;Horseradish
- Arnoseris minima, Lambs Succory;Hyoseris minima L;Lamb succory
- Arrhenatherum elatius, Oatgrass;Avena elatior L;Holcus avenaceus Scop;Avena avenaceum Scop PBeauv;Arrhenatherum avenaceum Scop PBeauv;False Oat-grass;Arrhenatherum elatius forma bulbosum (Willd) TKoyama;Arrhenatherum elatius subsp bulbosum (Willd) Hyl;Arrhenatherum tuberosum;Tall oatgrass
- Asarina procumbens, Trailing Snapdragon;Antirrhinum asarina L
- Asparagus asparagoides, Smilax Asparagus;Bridal Creeper;Myrsiphyllum asparagoides L Willd;Medeola asparagoides L;Dracaena medeoloides Lf;Asparagus medeoloides Lf Thunb;Elachanthera sewelliae FMuell;Luzuriaga sewelliae FMuell KKrause;African asparagus fern
- Asparagus officinalis, Garden Asparagus;Asparagus prostratus;Asparagus officinalis subsp officinalis L;Garden asparagus;Common Asparagus
- Asplenium polyodon, Sickle Asplenium;Sicklefern;Sickle Spleenwort;Mares Tail Fern;Tarachia polyodon GForst CPresl;Asplenium adiantoides var polyodon GForst CChr;Trichomanes adiantoides L;Asplenium adiantoides L CChr;Asplenium adiantoides var normale Domin;Tarachia adiantoides L Nakai ex Tuyama;Asplenium cultratum Gaudich;Asplenium falcatum Lam;Tarachia falcata Lam CPresl;Asplenium falcatum var whittlei FMBailey;Asplenium adiantoides var whittlei FMBailey Domin;Asplenium adiantoides var fibrillosum Domin;Asplenium adiantoides var macrurum Domin;Sickle speenwort
- Aster lanceolatus, Narrow-leaved Michaelmas-daisy;Aster lamarckianus auct, non Nees;Aster paniculatus auct, non Lam;Aster tradescantii auct, non L
- Aster linosyris, Goldilocks Aster;Chrysocoma linosyris L;Crinitaria linosyris (L) Less;Goldilocks
- Asterella tenella, Marchantia tenella L;Fimbraria tenella L Nees;Fimbriaria tenella orth var Nees sensu Nees von Esenbeck, CGD 1820;Fimbraria tenella var porphyrocephala Nees;Fimbriaria tenella var porphyrocephala orth var Nees sensu Bischoff, GWTG 1835;Fimbraria tenella L Nees var tenella;Fimbriaria tenella var porphyrocephala;Fimbriaria tenella;Marchantia tenella
- Asteriscus spinosus, Buphthalmum spinosum L;Pallenis spinosa L Cass
- Asystasia gangetica, Justicia gangetica L;Asystasia coromandeliana var micrantha Nees;Asystasia coromandeliana Nees;Chinese violet;Justicia gangetica;Asystasia nemorum;Asystasia coromandeliana
- Atriplex cinerea, Barilla;Grey Saltbush;Coast Saltbush;Grey salt bush;Neopreissia cinerea Poir Ulbr;Atriplex elaeagnoides Moq;Atriplex halimus L
- Atriplex littoralis, Grass-leaved Orache;Atriplex laciniata auct, non L;Grassleaf orache
- Aubrieta deltoidea, Aubretia;Alyssum deltoideum L;Lilacbush
- Aurinia saxatilis, Golden Alison;Aurinia saxatilis (L) Desv;Alyssum saxatile;Aethionema saxatile;Basket of gold;Basket Of Gold;Aethionema saxatile (L) R Br;Alyssum saxatile L
- Bacopa monnieri, Lysimachia monnieri L;Gratiola monnieri L L;Gratiola monnieria orth var L sensu Linnaeus, C von 1759;Herpestis monnieri L Kunth;Herpestis monnieria orth var Kunth sensu Kunth, CS 1818;Bramia monnieri L Drake;Bramia monnieria orth var Drake sensu Drake del Castillo, E 1893;Bramia monnieri L Pennell;Bramia indica Lam;Moniera cuneifolia Michx;Monniera cuneifolia orth var Michx sensu Michaux, A 1803;Herpestis cuneifolia Michx Pursh;Herb of grace;Bramia monnieri;Bacopa monnieri;Herb Of Grace;Bramia monnieri (L) Drake
- Baldellia ranunculoides, Lesser Water-plantain;Alisma ranunculoides L;Lesser Waterplantain;Echinodorus ranunculoides (L) Engelm
- Barringtonia acutangula, Itchy Tree;Freshwater Mangrove;Mangobark;Mango Pine;Stravadium denticulatum Miers;Barringtonia coccinea Lour Kostel;Barringtonia gracilis Miers RKnuth;Eugenia acutangula L;Huttum acutangulum L Britten;Meteorus coccineus Lour;Stravadium gracile Miers;Barringtonia denticulata Miers RKnuth
- Barringtonia asiatica, Mangobark;Mango Pine;Fish Killer Tree;Sea Putat;Putat Laut;Beach Barringtonia;Barringtonia speciosa JRForst & GForst;Mammea asiatica L;Michelia asiatica L Kuntze;Agasta asiatica L Miers;Huttum speciosum JRForst & GForst Britten;Sea putat
- Barringtonia racemosa, Putat;Cornbeefwood;Mango Pine;Mango;Freshwater Mangrove;Fish Poison Tree;Derbyshire Pine;China Pine;Cassowary Pine;Brackishwater mangrove;Barringtonia;Barringtonia longiracemosa CTWhite;Eugenia racemosa L;Butonica racemosa L Miers sensu Miers, J 1875;Huttum racemosum L Britten sensu Britten, J 1901
- Basilicum polystachyon, Musk Basil;Ocimum polystachyon L;Ocymum polystachyon orth var L sensu Linnaeus, C von 1771;Moschosma polystachyum L Benth;Plectranthus parviflorus RBr;Plectranthus micranthus Spreng;Moschosma polystachya orth var Benth sensu Bentham, G 1830
- Bassia scoparia, Kochia scoparia L Schrad;Chenopodium scoparia L;Summer-cypress;Kochia scoparia (L) Schrad;Burning bush;Kochia scoparia
- Bazzania trilobata, Bazzania hattoriana;Bazzania tridentoides;Bazzania trilobata var depauperata;Herpetium trilobatum;Jungermannia tridenticulata;Jungermannia trilobata L;Mastigobryum pompeanum var uedae;Mastigobryum tridenticulatum;Mastigobryum trilobatum;Plagiochila corniculata Dumort;Plagiochila tridenticulata Dumort Dumort;Pleuroschisma trilobata;Pleuroschisma trilobatum var depauperatum;Pleuroschisma trilobatum;Radula corniculata Dumort;Herptium triobatum;Jungermannia trilobata;Plagiochila corniculata;Plagiochila tridenticulata;Radula corniculata
- Bergenia crassifolia, Elephant-ears;Bergenia cordifolia;Saxifraga crassifolia L;Siberian-tea
- Berteroa incana, Hoary Alison;Alyssum incanum L;Hoary alyssum
- Berula erecta, Water Parsnip;Narrowleaf Water Parsnip;Sium erectum Huds;Sium angustifolium L;Berula angustifolia L Mert & WDJKoch;Carum sioides JMBlack;Sium latifolium var univittatum JMBlack;Lesser Water-parsnip;Siella erecta (Huds) Pimenov nom illegit;Cutleaf waterparsnip
- Bidens pilosa, Teasers;Grab-a-Leg;Broomstick;Pitchforks;Cobblers Pegs;Cobblers-pegs;Burr Marigold;Pitch-forks;Stick-tights;Cobblers Peg;Bidens sundaica var minor Blume;Coreopsis leucanthema L;Coreopsis leucantha orth var L sensu Linnaeus, C von 1755;Bidens leucanthema L Willd;Bidens leucantha orth var Willd sensu Willdenow, CL von 1803;Black-jack;Hairy beggarticks;Cobblers pegs;Bidens pilosa fma indivisa;Bidens leucantha var pilosa;Hairy Beggarticks;Bidens odorata Cav
- Bifora testiculata, Coriandrum testiculatum L;European Bishop
- Bituminaria bituminosa, Psoralea bituminosa L;Pitch Trefoil;Psoralea bituminosa;Arabian pea;Arabian Pea;Aspalthium bituminosum (L) Kuntze
- Blackstonia perfoliata, Yellow-wort;Gentiana perfoliata L;Chlora perfoliata L L
- Blainvillea acmella, Verbesina acmella L;Spilanthes acmella L Murray;Ceratocephalus acmella L Kuntze;Eclipta latifolia Lf;Blainvillea latifolia Lf Dc
- Blumea balsamifera, Sembong;Camphor Bush;Conyza balsamifera L;Ngai camphor
- Blumea riparia, Conyza riparia Blume;Conyza pubigera L;Blumea pubigera L Merr;Conyza elata FMBailey
- Blysmus compressus, Flat-sedge;Schoenus compressus L;Scirpus compressus (L) Pers non Moench
- Boehmeria nivea, Ramie;Urtica nivea L;Chinese grass;Chinese Grass;Ramium niveum (L) Small
- Bothriochloa pertusa, Indian Bluegrass;Holcus pertusus L;Andropogon pertusus L Willd;Pitted beardgrass
- Botrychium lunaria, Moonwort;Osmunda lunaria L;Common moonwort fern;Common moonwort
- Brachypodium distachyon, False Brome;Bromus distachyos L;Trachynia distachya L Link;Stiff Brome;Purple false brome
- Brachypodium pinnatum, Bromus pinnatus L;Heath False-brome;Brachypodium cugnacii auct, an A Camus;Heath false brome
- Brassica barrelieri, Sisymbrium barrelieri L
- Brassica juncea, Chinese Mustard;Sinapis juncea L;India mustard
- Brassica nigra, Black mustard;Black Mustard;Sinapis nigra L;Melanosinapis nigra (L) Calest
- Brassica rapa, Field mustard;Nabo Mexico;Brassica campestris L Synonym;Turnip;Brassica campestris l
- Brassica x juncea, Indian Mustard;Chinese Mustard;Brown Mustard;Leaf Mustard;Sinapis juncea L
- Bromus hordeaceus, Soft Brome;A Soft Brome;Goose Grass;Lop Grass;Soft Chess;Bromus mollis L;Serrafalcus hordeaceus L Gren & Godr;Serrafalcus mollis L Parl;Bromus molliformis JLloyd;Bromus molliformis JLloyd ex Billot;Serrafalcus molliformis JLloyd ex Billot FWSchultz;Bromus x pseudothominei PMSm;Bromus x pseudothominii orth var PMSm sensu Smith, P 1967;Soft brome
- Brucea javanica, Rhus javanica L;Gonus amarissimus Lour;Brucea sumatrana Roxb sensu Roxburgh, W 1820;Brucea amarissima Lour Merr
- Bruguiera cylindrica, Small fruited Orange Mangrove;Reflexed orange mangrove;Bruguiera caryophylloides Burmf Blume;Rhizophora cylindrica L;Rhizophora caryophylloides Burmf
- Bruguiera gymnorhiza, Red Mangrove;Orange Mangrove;Nobble rooted Mangrove;Large fruited Orange Mangrove;Black Mangrove;Tumu Merah;Large-leafed orange mangrove;Large Fruited Orange Mangrove;Large-fruited Orange Mangrove;Rhizophora gymnorhiza L;Bruguiera rheedei Blume;Bruguiera australis Arn;Rhizophora australis Arn Steud
- Buglossoides arvensis, Sheepweed;Corn Gromwell;White Ironweed;Lithospermum arvense L;Field Gromwell;Lithospermum arvense;Corn gromwell
- Bulbostylis capillaris, Scirpus capillaris L;Isolepis capillaris L Roem & Schult;Stenophyllus capillaris L Britton;Fimbristylis capillaris L AGray;Densetuft hairsedge;Bulbostylis;Scirpus brachyphyllus;Stenophyllus capillaris;Isolepis capillaris;Scirpus capillaris;Isolepis radiciflora
- Caesalpinia bonduc, Grey-nicker;Tatary Maw NIs, fide RMLaing, Trans & Proc New Zealand Inst 47 28, 1915;Guilandina bonduc L;Yellow nicker;Guilandina crista
- Caesalpinia crista, Guilandina nuga L;Caesalpinia nuga L WTAiton;Guilandina paniculata Lam;Caesalpinia paniculata Lam Roxb
- Caesalpinia pulcherrima, Paradise Flower;Peacock Tree;Barbados Pride;Poinciana pulcherrima L;Pride-of-Barbados;Poinciana pulcherrima;Pride of Barbados
- Cajanus cajan, Cytisus cajan L;Cajanus indicus Spreng;Pigeonpea;Gungo Pea;Cajanus indicus;Cytisus cajan;Cajanus bicolor
- Cajanus scarabaeoides, Dolichos scarabaeoides L;Rhynchosia scarabeoides L Dc;Atylosia scarabaeoides L Benth;Stizolobium scarabaeoides L Spreng;Dolichos minimus L;Rhynchosia biflora Dc;Cantharospermum pauciflorum Wight & Arn;Atylosia pauciflora Wight & Arn Druce;Atylosia scarabaeoides var queenslandica Domin;Showy pigeonpea
- Calamagrostis epigejos, Wood Small-reed;Arundo epigejos L
- Calamintha nepeta, Melissa nepeta L;Lesser calamint
- Caldesia parnassifolia, Alisma parnassifolium Bassi ex L;Caldesia reniformis DDon Makino;Alisma reniforme DDon;Alisma reniformis orth var DDon sensu Don, D 1825;Parnassus-leaved Water-plantain;Caldesia parnassiifolia
- Calicotome spinosa, Spiny Broom;Spartium spinosum L
- Callicarpa candicans, Urtica candicans Burmf;Callicarpa cana L;Callicarpa cana L var cana;Callicarpa cana var typica Bakh;Callicarpa adenanthera RBr;Callicarpa heynii Roth;Callicarpa sumatrana Miq
- Callitriche hermaphroditica, Autumnal Water-starwort;Callitriche autumnalis sensu Huds, non L;Northern water-starwort
- Callitriche palustris, Callitriche verna L;Narrow-fruited Water-starwort;Vernal water-starwort
- Calluna vulgaris, Heather;Ling;Erica vulgaris L
- Calotropis gigantea, Giant Calotrope;Asclepias gigantea L;Giant milkweed;Asclepias gigantea
- Calystegia sepium, Large Bindweed;Great Bindweed;Convolvulus sepium L;Hedge Bindweed;Hedge false bindweed;Convolvulus sepium
- Calystegia soldanella, Sea Bindweed;Convolvulus soldanella L;Convolvulus sepium var soldanella L CMoore & Betche;Convolvulus sepium var saldanella FMuell;Calystegia reniformis RBr;Convolvulus reniformis RBr Spreng;Seashore false bindweed
- Camelina sativa, Gold of Pleasure;False Flax;Myagrum sativum L;Gold-of-pleasure
- Camellia sinensis, Thea sinensis L;Tea
- Campsis radicans, Bignonia radicans L;Trumpet-creeper;Trumpet creeper;Trumpetcreeper;Trumpet Creeper
- Canavalia ensiformis, Jack Bean;Sword Bean;Dolichos ensiformis L;Wonderbean;Dolichos ensiformis
- Capnophyllum africanum, Conium africanum L;Caucalis africana L Crantz;Cicuta africana L Lam
- Capsella bursa-pastoris, Shepherds purse;Bolsa de Pastor Mexico;Shepherds Purse;Shepards Purse;Shephards Purse;Toywort;Shepherds Heart;St James Weed;Pickpocket;Locowort;Shepherds-purse;Thlaspi bursapastoris L;Capsella rubella;Bursa pastoris FH Wigg;Thlaspi bursa-pastoris L;Capsella bursa;Bursa bursa-pastoris (L) Britton;Bursa gracilis Gren;Capsella rubella Reut
- Cardamine bulbifera, Coralroot;Dentaria bulbifera L;Coralroot Bittercress
- Cardamine raphanifolia, Greater Cuckooflower;Cardamine chelidonia Lam non L;Cardamine latifolia Vahl
- Cardaria draba, Whitetop;Lepidium draba L Synonym;Hoary Cress;Lepidium draba;Lepidium draba L
- Carex curta, White Sedge;Carex canescens sensu Lightf et auct, non L
- Carex filiformis, Downy-fruited Sedge;Carex tomentosa L
- Carex hyalinolepis, Greater Pond-sedge;Carex riparia;Carex acuta auct, non L;Shoreline sedge;Shoreline Sedge;Carex impressa (SH Wright) Mack;Carex riparia auct non MA Curtis
- Carex lasiocarpa, Slender Sedge;Carex filiformis sensu Gooden et auct, non L;Carex tomentosa sensu Light et auct, non L;Woollyfruit sedge;Slender sedge
- Carex nigra, Common Sedge;Carex acuta;Carex acuta var nigra L;Carex goodenowii JGay nom illegit;Carex vulgaris Fr nom illegit;Smooth black sedge;Smooth Black Sedge;Carex acuta auct non L;Carex goodenowii J Gay;Carex vulgaris Fr
- Carex ovalis, Oval Sedge;Carex leporina sensu L(1754) et auct, non L(1753)Eggbract sedge
- Carex spicata, Spiked Sedge;Carex contigua Hoppe;Carex muricata auct, non L;Prickly sedge;Spiked sedge
- Carpanthea pomeridiana, Mesembryanthemum pomeridianum L
- Carpobrotus acinaciformis, Sally-my-handsome;Mesembryanthemum acinaciforme L
- Carpobrotus edulis, Hottentot Fig;Pigface;Mesembryanthemum edule L;Hottentot-fig;Carpobrotus acinaciformis sensu Lousley et auct, non (L) LBolus;Carpobrotus aequilaterus auct, non (Haw) NE Br;Carpobrotus chilensis auct, non (Molina) NE Br;Carpobrotus edulis var chrysophthalmus CD Preston & PD Sell;Hottentot fig
- Carrichtera annua, Wards Weed;Vella annua L;Cress Rocket
- Carthamus lanatus, Saffron Thistle;Woolly Star Thistle;Yellow Distaff Thistle;Phonus lanatus L Hill;Atractylis lanata L Scop;Carduus lanatus L Brot;Centaurea lanata L Lam & Dc;Heracantha lanata L Hoffmanns & Link;Onobroma lanatum L Bluff & Fingerh;Kentrophyllum lanatum L Dc & Duby;Carduncellus lanatus L Moris;Carthamus creticus L;Heracantha cretica L Hoffmanns & Link;Centaurea cretica L Spreng;Kentrophyllum creticum L Tausch;Kentrophyllum baeticum Boiss & Reut;Carthamus baeticus Boiss & Reut Nyman;Kentrophyllum lanatum var baeticum Boiss & Reut Batt;Downy Safflower;Woolly distaff thistle
- Carum verticillatum, Whorled Caraway;Sison verticillatum L
- Cascabela thevetia, Cerbera thevetia L;Cerbera peruviana Pers;Cascabela peruviana Pers Raf;Thevetia peruviana Pers KSchum;Thevetia peruviana
- Catabrosa aquatica, Whorl-grass;Aira aquatica L;Catabrosa aquatica subsp minor (Bab) FH Perring & PD Sell;Water whorlgrass;Brookgrass
- Catapodium marinum, Stiff Sand Grass;Stiff Sand-grass;Festuca marina L;Desmazeria marina L Druce;Sea Fern-grass;Desmazeria marina (L) Druce;Sea-fern Grass
- Catapodium rigidum, Rigid Fescue;Hard Poa;Fern Grass;Hard Meadow-grass;Poa rigida L;Festuca rigida L Raspail;Sclerochloa rigida L Link;Scleropoa rigida L Griseb;Desmazeria rigida L Tutin;Desmazeria rigidum orth var SWLJacobs, RDBWhalley & DJWheeler sensu Jacobs, SWL, Whalley, RDB & Wheeler, DJB 2009;Fern-grass;Catapodium rigidum subsp majus (C Presl) FH Perring & PD Sell;Desmazeria rigida (L) Tutin;Desmazeria rigida var major (C Presl) Stace;Festuca rigida (L) Raspail non Roth;Ferngrass
- Catharanthus roseus, Periwinkle;Billygoat Weed;Pink Periwinkle;Vinca rosea L;Pervinca rosea L Moench;Lochnera rosea L Rchb ex KSchum sensu Endlicher, SFL 1838;Ammocallis rosea L Small;Vinca rosea var alba GDon FMBailey;Vinca rosea var occellata GDon FMBailey;Vinca rosea L var rosea;Madagascar periwinkle;Lochnera rosea;Vinca rosea;Madagascar Periwinkle;Ammocallis rosea (L) Small;Lochnera rosea (L) Rchb ex Spach
- Cayratia trifolia, Yugali;Vitis trifolia L;Cissus trifolia L KSchum;Columella trifolia L Merr;Cissus acutifolia Poir;Cissus carnosa Lam;Cayratia carnosa Lam Gagnep;Cissus cinerea Lam;Cissus crenata Vahl;Cissus obtusifolia Poir;Vitis psoraliifolia FMuell;Vitis psoralifolia orth var FMuell sensu Mueller, FJH von 1860;Cissus psoralifolia orth var Planch sensu Planchon, JE 1887;Cissus psoraliifolia FMuell Planch
- Cedronella canariensis, Balm of Gilead;Dracocephalum canariense L;Cedronella triphylla Moench;Canary Islands Balm;Herb of Gilead
- Cenchrus americanus, Panicum americanum L;Pennisetum americanum L KSchum;Panicum lutescens Weigel sensu Weigel, CE von 1772;Chaetochloa lutescens Weigel ex Stuntz;Setaria lutescens Weigel ex Stuntz CEHubb;Panicum glaucum L;Pennisetum glaucum L RBr;Setaria glauca L PBeauv;Alopecurus typhoides Burmf;Pennisetum typhoides Burmf Stapf & CEHubb
- Cenchrus polystachios, Panicum polystachion L;Pennisetum polystachion L Schult;Pennisetum polystachion L Schult subsp polystachion;Pennisetum polystachyum orth var Schult sensu Schultes, JA 1824;Pennisetum polystachyon orth var ADChapm sensu Chapman, AD 1991
- Cenchrus purpurascens, Pennisetum compressum RBr;Gymnotrix compressa RBr Brongn;Gymnithrix compressa orth var Brongn sensu Brongniart, AT 1831;Setaria compressa RBr Kunth;Panicum compressum RBr Poir;Panicum alopecuroides L;Cenchrus compressus RBr Morrone;Pennisetum alopecuroides L Spreng;Alopecurus hordeiformis L;Panicum hordeiforme L Thunb;Pennisetum hordeiforme L Spreng
- Centaurea benedicta, Cnicus benedictus L;Carbeni benedicta L Adans;Carbena benedicta orth var Ewart sensu Ewart, AJ 1908
- Centaurium maritimum, Sea Centaury;Gentiana maritima L;Erythraea maritima L Pers;Chironia maritima L Willd
- Centella asiatica, Pennywort;Centella;Indian Pennywort, Gotu Cola ;Hydrocotyle asiatica L;Spadeleaf;Pegaga
- Centipeda minima, Spreading Sneezeweed;Spreading Sneeze Weed;Artemisia minima L;Cotula minuta GForst;Myriogyne minuta GForst Less;Myriogyne minuta var lanuginosa Dc;Centipeda orbicularis Lour;Centipeda orbicularis var lanuginosa Dc FMBailey;Artemisia sternutatoria Roxb;Cotula sternutatoria Wall ex Dc;Sphaeromorphaea russelliana var glabrata Dc;Sphaeromorphaea russeliana var glabrata orth var Dc sensu Candolle, AP de 1838;Spreading sneezeweed
- Centranthus calcitrapae, Annual Valerian;Valeriana calcitrapae L
- Centranthus ruber, Kiss-me-quick;Red Valerian;Red Valerian, Kiss-me-quick;Red Valerian, Kiss-me-quick, Jupiters Beard;Valeriana rubra L;Red valerian
- Cephalanthera longifolia, Narrow-leaved Helleborine;Serapias helleborine var longifolia L
- Cephalanthera rubra, Red Helleborine;Serapias rubra L
- Cerastium cerastoides, Starwort Mouse-ear;Arenaria trigyna (Vill) Shinners;Stellaria cerastoides L;Mountain chickweed
- Cerastium fontanum, Common Mouse-ear;Cerastium vulgatum sensu L(1759), non L(1755)Common mouse-ear chickweed
- Cerastium glomeratum, Sticky Mouse-ear;Cerastium viscosum auct, non L;Sticky chickweed;Cerastium viscosum
- Ceratocapnos claviculata, Climbing Corydalis;Corydalis claviculata (L) Dc;Dissosperma claviculata (L) Soják;Fumaria claviculata L
- Ceratocephala testiculata, Ceratocephala falcata;Curveseed butterwort;Bur Buttercup;Ranunculus testiculatus;Curveseed Butterwort;Ceratocephala falcata auct non (L) Pers;Ceratocephala orthoceras Dc;Ranunculus falcatus auct non L;Ranunculus testiculatus Crantz
- Ceratopteris thalictroides, Water Fern;Acrostichum thalictroides L;Indian fern;Watersprite;Acrostichum thalictroides
- Chaenorhinum minus, Small Toadflax;Antirrhinum minus L;Microrrhinum minus (L) Fourr;Dwarf snapdragon;Chaenorrhinum minus
- Chaenorhinum origanifolium, Malling Toadflax;Antirrhinum origanifolium L
- Chaerophyllum temulum, Rough Chervil;Chaerophyllum temulentum L;Rough chervil
- Chaiturus marrubiastrum, False Motherwort;Leonurus marrubiastrum;Lions tail;Lions Tail;Leonurus marrubiastrum L
- Chamaecrista absus, Hairy Cassia;Cassia absus L;Grimaldia absus L Link
- Chamaecrista mimosoides, Fiveleaf Cassia;Five-leaf Cassia;Cassia mimosoides L;Cassia mimosoides L subsp mimosoides;Chamaecrista
- Chamaecytisus supinus, Clustered Broom;Big-flower Broom;Cytisus supinus L
- Chamaemelum nobile, Common Chamomile;Anthemis nobilis L;Roman chamomile
- Chamaesyce hirta, Asthma-plant;Euphorbia hirta;Pillpod sandmat;Pillpod Sandmat;Euphorbia hirta L;Euphorbia pilulifera auct non L
- Chamaesyce hypericifolia, Chamaesyce glomerifera;Euphorbia hypericifolia;Graceful sandmat;Graceful Sandmat;Chamaesyce glomerifera Millsp;Euphorbia bifida auct non Hook & Arn;Euphorbia glomerifera (Millsp) LC Wheeler;Euphorbia hypericifolia L
- Chamaesyce hyssopifolia, Upright Spurge;Euphorbia serrulata;Euphorbia stricta L nom illegit;Euphorbia brasiliensis;Euphorbia hyssopifolia;Hyssopleaf sandmat;Hyssopleaf Sandmat;Chamaesyce brasiliensis (Lam) Small;Euphorbia brasiliensis Lam;Euphorbia hyssopifolia L
- Chamerion angustifolium, Rosebay Willowherb;Chamaenerion angustifolium (L) Scop nom illegit;Epilobium angustifolium L;Fireweed;Epilobium angustifolium
- Chenopodium ambrosioides, Mexican-tea;Chenopodium anthelminticum sensu HJ Coste, non L;Teloxys ambrosioides (L) WA Weber;Mexican tea
- Chenopodium capitatum, Strawberry-blite;Blitum capitatum L;Blite goosefoot
- Chenopodium chenopodioides, Saltmarsh Goosefoot;Blitum chenopodioides L;Chenopodium botryodes Sm;Low goosefoot
- Chenopodium simplex, Maple-leaved Goosefoot;Chenopodium hybridum;Mapleleaf goosefoot;Mapleleaf Goosefoot;Chenopodium gigantospermum Aellen;Chenopodium hybridum auct non L
- Chiloscyphus latifolius, Lophocolea latifolia Nees;Jungermannia bidentata L;Lophocolea bidentata L Dumort;Lophocolea bidentata L Dumort f bidentata;Chiloscyphus bidentatus L Steph;Lophocolea bidentata var tasmanica Gottsche;Lophocolea bidentata f simplicior Gottsche;Lophocolea bidentata f spinosior Gottsche
- Chiloscyphus polyanthos, Jungermannia polyanthos L;Chiloscyphus fragilis;Chiloscyphus lophocoleoides;Chiloscyphus nordstedtii;Chiloscyphus pallescens var erectus;Chiloscyphus pallescens var fragilis;Chiloscyphus pallescens var pallescens;Chiloscyphus pallescens;Chiloscyphus polyanthos var erectus;Chiloscyphus polyanthos var fragilis;Chiloscyphus polyanthos var grandicalyx;Chiloscyphus polyanthos var heterophylloides;Chiloscyphus polyanthos var pallescens;Chiloscyphus polyanthos var rivularis;Chiloscyphus polyanthos var viticulosus non L Lindb ex Mll Frib;Chiloscyphus rivularis var subteres;Chiloscyphus rivularis;Chiloscyphus viticulosus non L Lindb;Chiloscyphus webberianus;Jungermannia pallescens var rivularis;Jungermannia pallescens;Jungermannia polyanthos var pallescens;Jungermannia polyanthos var rivularis;Jungermannia polyanthos;Lophocolea heterophylla var paludosa;Plagiochila wakawana
- Christella parasitica, Cyclosorus parasiticus L Farw;Polypodium parasiticum L;Thelypteris parasitica L KIwats
- Chromolaena odorata, Eupatorium odoratum L;Osmia odorata L SchBip;Eupatorium affine Hook & Arn;Eupatorium brachiatum Sw ex Wikstr;Eupatorium clematitis Dc;Eupatorium conyzoides Mill;Eupatorium conyzoides Vahl;Osmia conyzoides SchBip;Eupatorium divergens Less;Osmia divergens Less SchBip;Eupatorium floribundum Kunth;Osmia floribunda Kunth SchBip;Eupatorium graciliflorum Dc;Osmia graciliflora Dc SchBip;Eupatorium sabeanum Buckley;Eupatorium stigmatosum Meyen & Walp;Jack in the bush;Eupatorium odoratum;Eupatorium dichotomum;Eupatorium conyzoides;Triffid Weed;Siam Weed;Christmas Bush
- Chrozophora tinctoria, Dyers Litmus Plant;Turnsole;Croton tinctoria L;Croton tinctorium orth var L sensu Linnaeus, C 1753;Turn-sole;Giradol
- Chrysanthemoides monilifera, Boneseed;Bitou Bush;Higgins Curse;Jungle Flower;Bitou bush;Osteospermum moniliferum L
- Chrysopogon zizanioides, Phalaris zizanioides L;Vetiveria zizanioides L Nash
- Cicendia filiformis, Slender Cicendia;Gentiana filiformis L;Microcala filiformis L Hoffmanns & Link;Yellow Centaury
- Cicerbita alpina, Alpine Blue-sow-thistle;Mulgedium alpinum (L) Less;Sonchus alpinus L
- Cicerbita plumieri, Hairless Blue-sow-thistle;Mulgedium plumieri (L) Dc;Sonchus plumieri L
- Cinnamomum camphora, Camphor Laurel;Laurus camphora L;Camphortree;Camphor Tree;Camphor-tree
- Cirsium acaule, Dwarf Thistle;Carduus acaulos L
- Cirsium arvense, Perennial Thistle;Creeping thistle;Creeping Thistle;Canada Thistle;Serratula arvensis L;Carduus arvensis L Robson;Cnicus arvensis L Roth;Breea arvensis L Less;Cephalonoplos arvensis L Fourr;Carduus lanatus Roxb ex Willd;Cirsium lanatum Roxb ex Willd Spreng;Canada thistle
- Cirsium dissectum, Meadow Thistle;Carduus dissectus L
- Cirsium eriophorum, Woolly Thistle;Carduus eriophorus L;Cirsium eriophorum subsp britannicum Petr
- Cirsium helenioides, Melancholy Thistle;Carduus heterophyllum;Carduus heterophyllus L;Melancholy thistle;Carduus helenioides L;Carduus helenoides L, orth var;Cirsium heterophyllum (L) Hill
- Cirsium oleraceum, Cabbage Thistle;Cnicus oleraceus L
- Cirsium palustre, Marsh Thistle;Carduus palustris L;Marsh thistle
- Cirsium tuberosum, Tuberous Thistle;Carduus tuberosus L
- Cirsium virginianum, Virginia Thistle;Carduus virginianus L;Cirsium revolutum (Small) Petr
- Cirsium vulgare, Spear Thistle;Scotch Thistle;Bull Thistle;Black Thistle;Carduus vulgaris Savi;Carduus lanceolatus L;Cirsium lanceolatum L Scop;Cnicus lanceolatus L Willd;Cirsium lanceolatum (L) Scop non Hill;Bull thistle
- Cistus salviifolius, Cistus salviifolia orth var L;Sage-leaved Rock-rose;Salvia Cistus
- Citharexylum spinosum, Fiddlewood;Citharexylum fruticosum L;Citharexylum quadrangulare Jacq;Spiny fiddlewood;Citharexylum fruticosum
- Citrullus colocynthis, Colocynth;Wild Watermelon;Vine of Sodom;Bitter cucumber;Bitter apple;Cucumis colocynthis L;Bitter Cucumber;Colocynthis vulgaris Schrad
- Citrullus lanatus, Bitter Melon;Camel melon;Wild Melon;Camel Melon;Pie Melon;Afghan Melon;Bastard Melon;Piemelon;Watermelon;Momordica lanata Thunb;Cucurbita citrullus L;Colocynthis citrullus L Kuntze;Citrullus vulgaris Schrad;Water Melon;Citrullus vulgaris;Momordica lanata
- Citrus x aurantium, Grapefruits;Oranges;Citrus aurantium var sinensis L;Citrus x sinensis L Osbeck
- Citrus x limon, Lemons;Lemon;Citrus medica var limon L
- Cladium mariscus, Great Fen-sedge;Schoenus mariscus L;Swamp Sawgrass;Swamp sawgrass
- Cladonia rangiferina, Cladina rangiferina L Nyl, Cladina rangiferina f crispata Coem JC Wei & YM Jiang, Cladina rangiferina f humilis Anders JC Wei & YM Jiang, Cladina rangiferina f patula Flot ex Sandst JC Wei & YM Jiang, Cladina rangiferina f prolifera Flot ex Sandst JC Wei & YM Jiang, Cladina rangiferina f rangiferina L Nyl, Cladina rangiferina subsp abbayesii Ahti WL Culb, Cladina rangiferina subsp grisea Ahti Ahti & MJ Lai, Cladina rangiferina subsp rangiferina L Nyl, Cladina rangiferina var crispatula Nyl, Cladina rangiferina var rangiferina L Nyl, Lichen rangiferinus L, Lichen rangiferinus var alpestris L, Lichen rangiferinus var rangiferinus L
- Cleome gynandra, Gynandropsis pentaphylla L Dc;Cleome pentaphylla L;Pedicellaria pentaphylla L Schrank, Roem & Usteri;Spiderwisp;Gynandropsis gynandra;Cleome pentaphylla;Gynandropsis pentaphylla;Gynandropsis gynandra (L) Briq
- Cleome viscosa, Tickweed;Mustard bush;Tick-weed;Mustard Bush;Tick Weed;Polanisia viscosa L Dc;Polanisia viscosa L Dc var viscosa;Polanisia viscosa var genuina Backer;Cleome flava Dc;Polanisia viscosa var speciosa Domin;Asian spiderflower;Asian Spiderflower;Cleome icosandra L;Polanisia viscosa (L) Dc
- Clerodendrum indicum, Turks turbin;Turks Turbin;Siphonanthus indicus L
- Clerodendrum inerme, Scrambling Clerodendrum;Scambling Clerodendrum;Volkameria inermis L;Volkameria commersonii Poir;Clerodendrum commersonii Poir Spreng;Clerodendrum ovatum Poir;Clerodendrum coromandelianum Spreng;Embrert
- Clinopodium nepeta, Lesser Calamint;Calamintha calamintha;Calamintha nepeta subsp glandulosa (Req) PW Ball;Melissa calamintha L
- Cnicus benedictus, Blessed Thistle;Centaurea benedicta (L) L;Cirsium pugnax Sommier & Levier
- Cnidoscolus urens, Cnidoscolus;Jatropha urens;Cnidoscolus adenophilus;Jatropha urens L
- Coccinia grandis, Bryonia grandis L;Ivy gourd
- Coincya monensis, Brassica monensis (L) Huds;Coincya hispida;Brassicella monensis (L) OE Schulz;Hutera monensis (L) Gomez-Campo;Rhynchosinapis monensis (L) Dandy ex AR Clapham;Sisymbrium monense L;Star-mustard
- Colocasia esculenta, Taro;Elephants Ears;Arum esculentum L;Caladium esculentum L Vent;Colocasia antiquorum var esculenta L Schott ex Seem;Colocasia antiquorum subsp esculenta L Haudr;Coco yam;Arum esculentum;Colocasia antiquorum;Elephants-Ear;Wild Taro
- Colubrina asiatica, Ceanothus asiaticus L;Asian nakedwood;Asiatic Colubrina;Asian Nakedwood
- Comarostaphylis polifolia, Alpine Bearberry;Arctostaphylos alpinus;Arbutus alpina L;Arctous alpina (L) Nied
- Conringia orientalis, Treacle Mustard;Hares Ear;Treakle Mustard;Hares-ear Treacle Mustard;Brassica orientalis L;Erysimum perfoliatum Crantz;Erysimum orientale L Mill;Hares-ear Mustard;Hares ear mustard
- Consolida ajacis, Eastern Larkspur;Delphinium ajacis L;Delphinium consolida L;Consolida ambigua auct, non (L) PW Ball & Heywood;Consolida gayanum (Wilmott) Laínz;Delphinium ambiguum auct, non L;Delphinium gayanum Wilmott;Doubtful knights-spur
- Conyza aegyptiaca, Erigeron aegyptiacus L;Erigeron aegyptiacum orth var L sensu Linnaeus, C von 1767
- Conyza bonariensis, Flax-leaf Fleabane;Cobblers Pegs;Flaxlef Fleabane;Flaxleaf Fleabane;Tall Fleabane;Rough Conyza;Erigeron bonariense L;Erigeron linifolius Willd;Erigeron linifolium orth var Willd;Conyza ambigua Dc;Erigeron crispus Pourr;Argentine Fleabane;Erigeron bonariensis L;Asthmaweed;Erigeron bonariensis;Marsea bonariensis
- Conyza canadensis, Canadian Fleabane;Erigeron canadensis L sensu Linnaeus, C 1753;Erigeron pusillus Nutt;Conyza parva Cronquist;Erigeron canadensis L;Canadian horseweed;Erigeron canadensis;Canadian Horseweed;Nipplewort
- Conyza sumatrensis, Tall Fleabane;Erigeron sumatrensis Retz;Conyza albida Willd ex Spreng;Guernsey Fleabane;Conyza bonariensis auct, non (L) Cronquist;Conyza floribunda Kunth;Conyza naudinii Bonnet nom illegit;Conyza sumatrensis var floribunda (Kunth) JB Marshall;Erigeron bonariensis auct, non L
- Cordyline fruticosa, Convallaria fruticosa L;Asparagus terminalis L;Dracaena terminalis L Jacq;Cordyline terminalis L Kunth;Calodracon terminalis L Planch;Cordyline jacquinii Kunth;Cordyline hedychioides FMuell;Cordyline terminalis var hedychioides FMuell Baker;Tiplant;Zhu jiao
- Coronilla scorpioides, Annual Scorpion-vetch;Ornithopus scorpioides L;Yellow crownvetch
- Coronopus didymus, Lesser swinecress;Lesser Swine-cress;Lepidium didymum L
- Corydalis cava, Hollowroot;Corydalis bulbosa auct, non (L) Dc, nom illegit;Fumaria bulbosa var cava L
- Corydalis solida, Bird-in-a-bush;Capnoides solida (L) Moench nom illegit;Corydalis bulbosa (L) Dc nom illegit;Fumaria bulbosa var solida L;Spring Fumewort;Corydalis bulbosa (L) Dc
- Corynephorus canescens, Grey Hair-grass;Aira canescens L;Gray clubawn grass
- Crassula aquatica, Pigmyweed;Tillaea aquatica L;Water pygmyweed
- Crassula tillaea, Mossy Stonecrop;Tillaea muscosa L;Moss pygmyweed
- Crataegus monogyna, May;Hawthorn;Mespilus monogyna Jacq All;Crataegus oxyacantha L;Crataegus laciniata Ucria;Crataegus monogyna subsp nordica Franco;Oneseed hawthorn
- Crataegus pedicellata, Pear-fruited Cockspurthorn;Crataegus coccinea auct, non L;Scarlet hawthorn;Crataegus coccinea;Crataegus ellwangeriana
- Crataegus submollis, Hairy Cockspurthorn;Crataegus coccinea auct, non L;Quebec hawthorn
- Crepis capillaris, Smooth Hawksbeard;Smooth Hawks beard;Smooth Hawks-beard;Lapsana capillaris L;Crepis virens L;Smooth hawksbeard
- Crepis paludosa, Marsh Hawks-beard;Hieracium paludosum L
- Crepis praemorsa, Leafless Hawks-beard;Hieracium praemorsum L
- Crocus vernus, Spring Crocus;Crocus sativus var vernus L;Dutch crocus
- Crossandra infundibuliformis, Justicia infundibuliformis L
- Crupina vulgaris, Centaurea crupina L;Serratula crupina L Vill;False Saw-wort;Common crupina;Common Crupina
- Crypsis schoenoides, Phleum schoenoides L;Heleochloa schoenoides L Host;Swamp pricklegrass
- Cryptotaenia canadensis, Sison canadense L;Canadian honewort
- Cucumis maderaspatanus, Mukia maderaspatana L MRoem;Melothria maderaspatana L Cogn;Bryonia scabrella L;Melothria argentea Domin;Melothria celebica var villosior Cogn;Mukia scabrella L Arn
- Cullen americanum, Scurfy Pea;Psoralea americana;American scurfpea;American Scurfpea;Cullen americana (L) Rydb, orth var;Psoralea americana L;Psoralea dentata Dc
- Cuscuta epithymum, Common Dodder;Lesser Dodder;The Lesser Dodder;Cuscuta europaea var epithymum L;Clover Dodder
- Cyanella hyacinthoides, Cyanella capensis L
- Cyanopsis muricata, Morocco Knapweed;Centaurea muricata L
- Cyanotis axillaris, Commelina axillaris L;Zygomenes axillaris L Salisb;Phak Plaap Naa
- Cyanthillium cinereum, Conyza cinerea L;Vernonia cinerea L Less;Vernonia cinerea L Less var cinerea;Vernonia cinerea f genuina Domin;Vernonia cinerea var lanata JKost;Little ironweed;Cacalia cinerea;Conyza cinerea;Vernonia cinerea
- Cyathula prostrata, Achyranthes prostrata L;Pastureweed;Achyranthes prostrata
- Cyclospermum leptophyllum, Slender Celery;Pimpinella leptophylla Pers;Aethusa leptophylla Pers Spreng;Helosciadium leptophyllum Pers Dc;Apium leptophyllum Pers FMuell;Apium leptophyllum Pers FMuell var leptophyllum;Seseli ammi Savi;Apium ammi Urb sensu Urban, I 1879;Apium ammi Urb var ammi;Apium ammi var genuinum HWolff;Cnidium tenuifolium Moench;Apium tenuifolium Moench Thell;Marsh parsley;Apium leptophyllum;Marsh Parsley;Apium leptophyllum (Pers) F Muell ex Benth;Apium tenuifolium (Moench) Thell ex Hegi;Cyclospermum ammi Lag, non Sison ammi L
- Cydonia oblonga, Quince;Cydonia vulgaris Pers;Pyrus cydonia L
- Cymbalaria muralis, Ivyleaf Toadflax;Ivy-leaved Toadflax;Ivy-leaved Toad Flax;Antirrhinum cymbalaria L;Linaria cymbalaria L Mill;Linaria cymbalaria (L) Mill;Kenilworth ivy
- Cynara cardunculus, Globe Artichoke;Cynara scolymus L;Cardoon
- Cynodon dactylon, Devil Grass;Star Grass;Creeping Finger Grass;Indian Daub Grass;Bermuda Grass;Indian Couch;Swamp Couch;Green Couch;Common Couch;Couch Grass;Bermuda grass;Doub grass;Couch grass;Couch-grass;Doob;Panicum dactylon L;Bermuda-grass;Cynodon incompletus;Bermudagrass;Capriola dactylon (L) Kuntze;Cynodon aristiglumis Caro & Snchez;Cynodon incompletus auct non Nees;Capriola dactylon;Zacate bermuda
- Cynoglossum germanicum, Green Hounds-tongue;Cynoglossum germanicum subsp pellucidum (Lapeyr) Sutorì Cynoglossum montanum auct, non L
- Cyperus entrerianus, Cyperus luzulae;Woodrush Flatsedge;Cyperus luzulae auct non (L) Rottb ex Retz;Scirpus luzulae auct non L;Cyperus globulosus;Scirpus luzulae
- Cyperus retrofractus, Rough Flatsedge;Cyperus dipsaciformis Fernald;Scirpus retrofractus L
- Cyrtococcum patens, Panicum patens L
- Cytisus scoparius, Common Broom;English Broom;Spartium scoparium L;Sarothamnus scoparius L Wimm ex WDJKoch;Genista andreana Puiss;Sarothamnus scoparius var prostratus CBailey;Sarothamnus scoparius (L) WDJ Koch;Scotch broom;Scotch Broom
- Dactyloctenium aegyptium, Finger Grass;Coast Button Grass;Coast Button grass;Cynosurus aegyptius L;Eleusine cruciata Lam;Eleusine aegyptia L Desf;Eleusine aegyptiaca orth var Desf;Egyptian Grass;Egyptian grass
- Dactylorhiza incarnata, Early Marsh-orchid;Dactylorchis incarnata (L) Verm;Orchis incarnata L;Orchis latifolia sensu Pugsley
- Dactylorhiza maculata, Heath Spotted-orchid;Dactylorchis maculata (L) Verm;Orchis maculata L
- Dactylorhiza viridis, Coeloglossum viride;Satyrium viride L;Longbract frog orchid
- Damasonium alisma, Starfruit;Alisma damasonium L
- Danthonia decumbens, Festuca decumbens L;Sieglingia decumbens L Bernh;Heath-grass;Sieglingia decumbens (L) Bernh;Common heathgrass
- Datura inoxia, Downy Thornapple;Recurved Thorn-apple;Datura meteloides Dc ex Dunal;Datura innoxia;Datura metel;Datura fastuosa;Pricklyburr;Datura fastuosa auct non L;Datura innoxia Mill, orth var;Datura metel auct non L;Datura meteloides auct non Dunal pp
- Datura quercifolia, Angels-trumpets;Datura ferox;Chinese Thorn-apple;Datura ferox auct non L
- Datura stramonium, Cranky Flower;Cemetary Flower;Common Thornapple;Common Thorn-apple;False Castor Oil;Stramonium;Mad Apple;Thorn Apple;Datura tatula L;Datura inermis Jacq;Jimsonweed
- Dendrolobium umbellatum, Horse Bush;Hedysarum umbellatum L;Desmodium umbellatum L Dc;Aeschynomene arborea L
- Dentella repens, Oldenlandia repens L;Hedyotis repens L Lam;Lippaya telephioides Endl
- Deschampsia cespitosa, Tufted Hairgrass;Tufted Hair-grass;Tufted Hair-Grass;Tufted hair-grass;Tufted hair grass;Aira cespitosa L;Tufted hairgrass
- Deschampsia flexuosa, Wavy Hair-grass;Aira flexuosa L;Wavy hairgrass;Avenella flexuosa
- Descurainia sophia, Flixweed;Sisymbrium sophia L;Herb sophia
- Desmanthus pernambucanus, Mimosa pernambucanus L;Pigeon bundleflower
- Desmanthus virgatus, Mimosa virgata L;Wild tantan;Ground Tamarind;Acuan virgatum
- Desmodium gangeticum, Hedysarum gangeticum L;Meibomia gangetica L Kuntze
- Desmodium heterocarpon, Hedysarum heterocarpon L;Meibomia heterocarpa L Kuntze;Hedysarum polycarpum Poir;Desmodium polycarpum Poir Dc;Hedysarum tuberculosum Labill;Desmodium trichocaulon Dc;Desmodium trichocaulum orth var Dc sensu Candolle, ALP de 1825;Asian ticktrefoil
- Desmodium triflorum, Tropical Trefoil;Creeping Tick Trefoil;Hedysarum triflorum L;Sagotia triflora L Duchass & Walp;Meibomia triflora L Kuntze;Threeflower ticktrefoil;Hedysarum triflorum
- Desmostachya bipinnata, Briza bipinnata L;Uniola bipinnata L L;Stapfiola bipinnata L Kuntze;Jilda
- Dietes iridioides, Moraea iridioides L
- Digitaria insularis, Andropogon insularis L;Sourgrass;Valota insularis;Panicum insulare;Trichachne insularis
- Digitaria sanguinalis, Crab Grass;Summer Grass;A Summer Grass;Summergrass;Crabgrass;Panicum sanguinale L;Dactylon sanguinalis L Vill;Syntherisma sanguinalis L Dulac;Hairy Finger-grass;Hairy crabgrass
- Dimorphotheca fruticosa, Osteospermum fruticosum L Norl;Calendula fruticosa L
- Dimorphotheca pluvialis, Field Marigold;Cape Marigold;Calendula pluvialis L;Dimorphotheca annua Less;Cape Rain-daisy;Weather Prophet
- Diplocyclos palmatus, Native Bryony;Bryonia palmata L;Zehneria erythrocarpa FMuell;Bryonopsis laciniosa var erythrocarpa FMuell Naudin;Trichosanthes muelleri Cogn;Bryonia laciniosa L sensu Bentham, G 1867;Bryonopsis laciniosa L Naudin sensu Cogniaux , CA & Harms, H 1924;Bryonopsis laciniosa var typica Domin
- Diplotaxis muralis, Annual wallrocket;Wall Rocket;Sand Mustard;Wall Mustard;Sand Rocket;Annual Wall Rocket;Sea Rocket;Sisymbrium murale L;Brassica muralis L Huds;Annual Wall-rocket
- Diplotaxis tenuifolia, Lincoln Weed;Sand Rocket;Buchan Weed;Wall Rocket;Perennial Wallrocket;Sand Mustard;Sisymbrium tenuifolium L;Brassica tenuifolia L Fr;Perennial Wall-rocket;Perennial wallrocket
- Dipogon lignosus, Mile a minute;Dolichos Pea;Common Dipogon;Purple Dolichos;Dolichos lignosus L;Verdcourtia lignosa L RWilczek;Verdcourtia lignosus orth var ADChapman sensu Chapman, AD 1991
- Dipsacus sativus, Wild Teasel;Dipsacus fullonum var sativus L;Dipsacus fullonum subsp sativus L Thell;Fullers Teasel;Dipsacus fullonum subsp fullonum L sensu AR Clapham;Indian teasel
- Disphyma crassifolium, Round-leaved Pigface;Mesembryanthemum crassifolium L;Purple Dewplant;Disphyma australe auct, non (Aiton ex G Forst) NE Br
- Dittrichia viscosa, Erigeron viscosus L;Inula viscosa L Aiton;Cupularia viscosa L Godr & Gren;Woody Fleabane;Inula viscosa (L) Aiton;False Yellowhead;Cupularia viscosa (L) Gren & Godr;Inula viscosa (L) Aiton
- Dodonaea viscosa, Sticky Hop-bush;Wedge leaf Hopbush;Switchsorrel;Soapwood;Native Hop Bush;Native Hop;Narrow leaf Hopbush;Giant Hopbush;Candlewood;Broad leaf Hopbush;Sticky Hopbush;Sticky Hop Bush;Dodonaea ovata DumCours;Ptelea viscosa L;Dodonaea dioeca Roxb;Dodonaea angustifolia Roxb;Dodonaea neriifolia ACunn ex AMGray;Dodonaea scabra Lodd ex Loudon;Florida hopbush
- Dorycnium rectum, Lotus rectus L;Greater Badassi
- Draba nemorosa, Draba muralis L;Draba nemoralis Ehrh;Woodland draba
- Dracunculus vulgaris, Dragon Arum;Arum dracunculus L;Common Dracunculus
- Drosera anglica, Great Sundew;Drosera longifolia L;English sundew
- Drosera intermedia, Oblong-leaved Sundew;Drosera longifolia auct, non L;Spoonleaf sundew;Drosera americana
- Drymaria cordata, Tropical Chickweed;Holosteum cordatum L;Whitesnow;Holosteum cordatum
- Drynaria quercifolia, Oakleaf Fern;Oak-leaf Fern;Polypodium quercifolium L;Polypodium quercifolium var normale FMBailey;Polypodium quercifolium L var quercifolium;Phymatodes quercifolia L CPresl
- Duranta erecta, Golden dewdrop;Duranta repens L;Duranta plumieri Jacq;Duranta plumieri Jacq var plumieri;Duranta plumieri var normalis FMBailey;Duranta plumieri var alba Mast;Duranta plumieri var ellisia L Hort ex Woodrow;Duranta plumieri f variegata FMBailey;Golden dewdrops;Jia lian qiao;Duranta repens;Duranta repens var microphylla
- Dysphania ambrosioides, Chenopodium ambrosioides L;Chenopodium ambrosioides L f ambrosioides;Chenopodium ambrosioides L var ambrosioides;Chenopodium ambrosioides f spathulatum Moq Aellen;Chenopodium suffruticosum Willd;Chenopodium ambrosioides subsp suffruticosum Willd Thell;Chenopodium ambrosioides var suffruticosum Willd Graebn;Chenopodium ambrosioides var suffruticosum Willd Thell;Chenopodium ambrosioides var anthelminticum L AGray;Chenopodium anthelminticum L;Dysphania anthelmintica L Mosyakin & Clemants;Chenopodium integrifolium Vorosch;Chenopodium suffruticosum subsp remotum Vorosch;Ambrina spathulata Moq;Chenopodium spathulatum Moq Moq;Chenopodium ambrosioides
- Dysphania multifida, Chenopodium multifidum L;Roubieva multifida L Moq
- Ecballium elaterium, Squirting Cucumber;Momordica elaterium L
- Ecbolium ligustrinum, Justicia ecbolium L;Justicia ligustrina Vahl;Ecbolium linneanum Kurz
- Echinochloa colona, River Grass;Swamp Grass;Awnless Barnyard Grass;Awnless Barnyard-grass;Barnyard grass;Awnless Barnyard grass;Water Grass;Jungle Rice;Panicum colonum L;Oplismenus colonus L Kunth;Echinochloa crus-galli subsp colona L Honda;Shama Millet;Jungle rice;Panicum musei;Panicum colonum
- Echinochloa crus-galli, Water Grass;Swamp Grass;Cockspur Panic Grass;Barnyard Grass;Swamp Barnyard Grass;Barnyard Millet;Stump Millet;Japanese Millet;Wild Millet;Cockspur Grass;Panicum crus-galli L;Oplismenus crus-galli L Dumort;Orthopogon crus-galli L Spreng;Cockspur;Barnyardgrass;Water Grass, Cockspur, Cocksfoot Panicum, Panic Grass
- Echinops bannaticus, Blue Globe-thistle;Echinops ritro auct, non L
- Echinops exaltatus, Globe-thistle;Echinops commutatus Jur;Echinops sphaerocephalus auct, non L;Tall globethistle
- Echium plantagineum, Purple Vipers-bugloss;Echium lycopsis auct, non L;Salvation jane
- Eclipta prostrata, White Eclipta;Verbesina prostrata L;Verbesina alba L;Cotula alba L L;Eclipta alba L Hassk;Eclipta erecta L;Eclipta alba var erecta L Miq;False daisy;Verbesina alba;Verbesina prostrata;Wedelia psammophila;Eclipta alba
- Elaeagnus umbellata, Spreading Oleaster;Elaeagnus angustifolia auct, non L;Autumn olive;Oriental Olive;Autumn Olive;Japanese silverberry
- Eleocharis acicularis, Needle Spike-rush;Scirpus acicularis L;Needle spikerush;Needle spike-rush
- Eleocharis palustris, Scirpus palustris L;Common Spike-rush;Common spikerush;Common spike-rush
- Elephantopus mollis, Elephantopus carolinianus var mollis Kunth Beurlin;Elephantopus tomentosus L;Elephantopus scaber var tomentosa L SchBip ex Baker;Elephantopus martii Graham;Elephantopus sericeus Graham;Elephantopus hypomalacus SFBlake;Elephantopus pilosus Philipson;Soft elephantsfoot;Elephantopus martii;Elephantopus tomentosus;Elephantopus pilosus;Elephantopus scaber var tomentosus;Elephantopus carolinianus var mollis
- Eleusine coracan, Finger Millet;African Millet;Indian Millet;Cynosurus coracan L;Cynosurus coracanus orth var L
- Elymus caninus, Bearded Couch;Agropyron caninum (L) P Beauv;Agropyron donianum FB White;Elymus caninus subsp donianus (FB White) PDSell;Elymus caninus var donianus (FB White) Jaaska;Elymus donianus (FB White) Á Löve & D Löve;Elymus trachycaulus subsp donianus (FB White) Á Löve;Roegneria canina (L) Nevski;Roegneria doniana (FB White) Melderis;Triticum caninum L;Bearded Wheatgrass;Agropyron caninum (L) P Beauv
- Elymus repens, Common Couch;Agropyron repens (L) P Beauv;Elytrigia repens;Gould;Triticum repens L;Quackgrass;Agropyron repens (L) P Beauv;Elytrigia repens (L) Desv ex Nevski;Elytrigia vaillantiana (Wulfen & Schreb) Beetle;Triticum vaillantianum Wulfen & Schreb
- Elytrigia repens, English Couch;Agropyrum repens orth var Roem & Schult sensu Roemer, JJ & Schultes, JA 1817;Triticum repens L;Agropyron repens L PBeauv;Zeia repens L Lunell;Elymus repens L Gould
- Emex spinosa, Lesser Jacks;Lesser Jack;Rumex spinosus L;Spiny threecornerjack;Devils Thorn
- Emilia sonchifolia, Red Tassel Flower;Emilia;Cacalia sonchifolia L;Lilac tasselflower;Cacalia sonchifolia;Lilac Tasselflower
- Entada rheedii, Entada cirrhosa Raf;Entada gogo Blanco IMJohnst;Entada monostachya Dc;Entada scandens var aequilatera Domin;Mimosa entada L;Adenanthera gogo Blanco;Entada pursaetha Dc
- Epipactis helleborine, Broad-leaved Helleborine;Serapias helleborine L;Epipactis youngiana;Broadleaf helleborine;Broad-leaved helleborine
- Epipactis palustris, Marsh Helleborine;Serapias helleborine var palustris L;Marsh Orchid
- Epipremnum pinnatum, Golden Pothos Vine;Rhaphidophora pinnata L Schott;Pothos pinnatus L;Pothos pinnata orth var L;Rhaphidophora cunninghamii Schott;Rhaphidophora cunninghami orth var Schott;Rhaphidophora lovellae FMBailey;Centipede tongavine
- Equisetum fluviatile, Water Horsetail;Equisetum fluviatile subsp limosum (L) A Blytt;Equisetum heleocharis Ehrh nom illegit;Equisetum lacustre Opiz;Equisetum limosum L;Equisetum limosum subsp fluviatile (L) Arcang;Equisetum limosum var fluviatile (L) Newman;Water horsetail
- Eragrostis amabilis, Poa amabilis L;Megastachya amabilis L PBeauv;Cynodon amabilis L Raspail;Poa tenella L;Eragrostis tenella L PBeauv ex Roem & Schult;Eragrostis elytroblephara Steud;Poa plumosa Retz;Eragrostis plumosa Retz Link;Japanese Lovegrass;Eragrostis tenella (L) P Beauv ex Roem & Schult;Japanese lovegrass;Eragrostis tenella
- Eragrostis cilianensis, Black Grass;Strong-scented Lovegrass;Stinking Lovegrass;Stink Grass;Stinkgrass;Stink-grass;Stink grass;Poa cilianensis All;Briza eragrostis L;Eragrostis major Host;Poa megastachya Koeler;Eragrostis megastachya Koeler Link;Eragrostis megastachya (Koeler) Link
- Eragrostis ciliaris, Gophertail Lovegrass;Poa ciliaris L;Gophertail lovegrass
- Eragrostis minor, Small Stinkgrass;Smaller Stink-grass;Smaller Lovegrass;Poa eragrostis L;Eragrostis eragrostis L PBeauv;Eragrostis pooides PBeauv ex Roem & Schult;Small Love-grass;Little lovegrass
- Eragrostis pilosa, Indian Love Grass;Soft Lovegrass;Soft Love-grass;Indian Lovegrass;Weeping Grass;A love grass;Weeping Love Grass;Poa pilosa L;Poa verticillata Cav;Eragrostis verticillata Cav PBeauv;Jersey Love-grass;Indian lovegrass;Small love grass;Eragrostis mexicana;Eragrostis capillaris
- Eranthis hyemalis, Winter Aconite;Helleborus hyemalis L;Winter aconite
- Erechtites hieraciifolia, American fireweed;Senecio hieraciifolius L;Senecio hieracifolius;American burnweed;Erechtites hieracifolia
- Eremochloa ciliaris, Nardus ciliaris L;Eremochloa horneri Buse;Fringed centipede grass
- Eremopyrum orientale, Oriental False Wheatgrass;Agropyron orientale (L) Roem & Schult;Secale orientale L
- Erica erigena, Irish Heath;Erica carnea subsp occidentalis (Benth) Laínz;Erica herbacea auct, non L;Erica herbacea subsp occidentalis (Benth) La¡nz;Erica hibernica (Hook & Arn) Syme non Utinet;Erica mediterranea var hibernica Hook & Arn
- Erigeron annuus, Tall Fleabane;Aster annuus L;Erigeron annuus subsp strigosus (Muhl ex Willd) Wagenitz;Erigeron strigosus Muhl ex Willd;Phalacroloma annuum subsp strigosum (Muhl ex Willd) Adema;Eastern daisy fleabane
- Erigeron borealis, Alpine Fleabane;Erigeron alpinus sensu Dicks et auct, non L;Trimorpha alpina Gray;Trimorpha borealis Vierh;Boreal fleabane
- Eriochloa punctata, Louisiana Cupgrass;Milium punctatum L;Louisiana cupgrass;Eriochloa kunthii;Helopus cognatus;Helopus kunthii
- Erodium cicutarium, Common Crowfoot;Common Storkbill;Common Herons-bill;Common Storksbill;Alfilaria;Alfilaree;Redstem Filaree;Small Crowfoot;Common Herons Bill;Geranium cicutarium L;Geranium cicutarium L var cicutarium;Geranium chaerophyllum Cav sensu Cavanilles, AJ 1787;Erodium stellatum Delile;Common Storks-bill;Erodium ballii Jord;Erodium cicutarium subsp arvale Andreas;Erodium cicutarium subsp bipinnatum auct, non (Cav) Tourlet;Erodium cicutarium subsp dunense Andreas;Erodium pimpinellifolium (Curtis ex With) Sibth;Erodium triviale Jord;Redstem storks bill;Red-stemmed filaree
- Erodium maritimum, Sea Storks-bill;Geranium maritimum L
- Erodium moschatum, Musky Crowsfoot;Crowfoot;Musky Storkbill;Musky Crowfoot;Musk Storksbill;Ground Needles;Whitestem Filaree;Musk Erodium;Musky Herons-bill;Musky Storksbill;Geranium moschatum L;Musk Storks-bill;Geranium cicutarium var moschatum L;Musky storks bill
- Erophila verna, Whitlow Grass;Vernal Whitlow Grass;Erophila vulgaris Dc;Draba verna L
- Erysimum cheiri, Wallflower;Cheiranthus cheiri L;Aegean wallflower
- Erysimum x cheiri, Cheiranthus cheiri L
- Euclidium syriacum, Anastatica syriaca L;Syrian mustard
- Euonymus latifolius, Large-leaved Spindle;Euonymus europaeus var latifolius L
- Eurybia schreberi, Nettle-leaved Michaelmas-daisy;Aster macrophyllus auct, non L;Aster schreberi;Schrebers aster
- Euryops abrotanifolius, Euryops;Winter Euryops;Othonna abrotanifolia L
- Evolvulus alsinoides, Convolvulus alsinoides L;Evolvulus linifolius L;Slender dwarf morning-glory;Tu ding gui;Evolvulus alsinoides var debilis;Evolvulus debilis;Convolvulus alsinoides
- Evolvulus nummularius, Convolvulus nummularius L;Agracejo rastrero;Duan geng tu ding gui;Convolvulus nummularius
- Fagopyrum esculentum, Buckwheat;Polygonum fagopyrum L;Fagopyrum sagittatum Gilib nom inval
- Fallopia dumetorum, Copse-bindweed;Bilderdykia dumetorum (L) Dumort;Polygonum dumetorum L;Reynoutria scandens var dumetorum (L) Shinners
- Festuca brevipila, Hard Fescue;Festuca longifolia;Festuca cinerea var trachyphylla (Hack) Stohr;Festuca longifolia sensu CE Hubb et auct, non Thuill;Festuca stricta subsp trachyphylla (Hack) Patzke nom inval;Festuca trachyphylla (Hack) Krajina non Hack ex Druce;Hard fescue;Festuca trachyphylla;Festuca cinerea auct non Vill;Festuca duriuscula auct non L;Festuca longifolia auct non Thuill;Festuca michiganica Alexeev;Festuca ovina auct non L;Festuca trachyphylla (Hack) Krajina, nom illeg
- Festuca vivipara, Viviparous Sheeps-fescue;Festuca ovina var vivipara L
- Ficaria verna, Ranunculus ficaria L
- Filipendula ulmaria, Meadowsweet;Spiraea ulmaria L;Queen of the meadow
- Filipendula vulgaris, Dropwort;Filipendula hexapetala Gilib nom inval;Spiraea filipendula L
- Fimbristylis dichotoma, Common Fringe-rush;Scirpus dichotomus L;Scirpus diphylla Retz;Fimbristylis diphylla Retz Vahl;Fimbristylis diphyllum orth var Vahl sensu Vahl, MH 1805;Fimbristylis diphylla Retz Vahl f diphylla;Fimbristylis diphylla Retz Vahl var diphylla;Fimbristylis elongata RBr;Scirpus elongata orth var Poir;Scirpus elongatus RBr Poir;Fimbristylis gracilis RBr;Scirpus gracilis RBr Poir;Fimbristylis diphylla var gracilis RBr Benth;Scirpus gracilis RBr Kuntze;Fimbristylis stricta RBr;Scirpus strictus RBr Poir;Scirpus stricta orth var Poir;Fimbristylis variabilis RBr;Scirpus variabilis RBr Poir;Fimbristylis royeniana Nees;Fimbristylis striata Labill;Fimbristylis communis Kunth;Fimbristylis polymorpha Boeckeler;Fimbristylis diphylla f coarctata Domin;Fimbristylis diphylla f glabra Domin;Fimbristylis diphylla var polystachya Domin;Fimbristylis diphylla f subpubescens Domin;Fimbristylis gracilis Nees ex Benth;Fimbristylis tristachya Nees ex Benth;Fimbristylis obtusifolia Nees ex Benth;Forked fimbry;Scirpus diphyllus;Fimbristylis polymorpha;Fimbristylis annua var diphylla;Scirpus dichotomus;Fimbristylis annua
- Fimbristylis ferruginea, Scirpus ferrugineus L;Fimbristylis brevifolia RBr;Scirpus brevifolius RBr Poir;Scirpus brevifolia orth var Poir sensu Poiret, JLM 1817;West Indian fimbry
- Fimbristylis quinquangularis, Scirpus quinquangularis Vahl;Trichelostylis quinquangularis Vahl Nees;Trichelostyles quinquangularis orth var Benth sensu Bentham, G 1878;Scirpus miliaceus L;Fimbristylis miliacea L Vahl;Fimbristylis miliaceum orth var Vahl sensu Vahl, MH 1805;Trichelostylis miliacea L Nees;Trichelostyles miliacea orth var Benth sensu Bentham, G 1878;Fiveangle fimbry;Scirpus quinquangularis;Trichelostylis quinquangularis
- Flemingia lineata, Hedysarum lineatum L;Hedysarum lineata orth var ADChapm sensu Chapman, AD 1991;Maughania lineata L Kuntze;Moghania lineata orth var Kuntze sensu Kuntze, CEO 1891
- Fossombronia pusilla, Jungermannia pusilla L;Noteroclada perpusilla Colenso;Fossombronia perpusilla Colenso Steph;Fossombronia loitlesbergeri;Fossombronia maritima;Fossombronia perpusilla;Fossombronia pusilla var corsa;Fossombronia pusilla var decipiens;Fossombronia pusilla var maritima;Fossombronia pusilla var ochrospora;Fossombronia pusilla var pusilla;Fossombronia wondraczekii var loitlesbergeri;Noteroclada perpusilla
- Frangula alnus, Alder Buckthorn;Rhamnus frangula L;Glossy Buckthorn;Glossy buckthorn;Rhamnus frangula
- Fuirena ciliaris, Scirpus ciliaris L;Fuirena glomerata Lam;Umbrella Grass
- Fumaria vaillantii, Few-flowered Fumitory;Earthsmoke;Fumaria officinalis auct non L
- Furcraea foetida, Mauritius hemp;Furcraea gigantea Vent;Agave foetida L;Furcraea gigantea;Mauritius-hemp
- Gagea lutea, Yellow Star-of-Bethlehem;Ornithogalum luteum L
- Galium aparine, Large Goosegrass;Cleavers;Bedstraw;Goose-grass;Goose Grass;Goosegrass, Cleavers;Cleavers, Goosegrass;Galium spurium;Stickywilly;Large Goosegrass, Cleavers, Catchweed, Cleaver Wort, Spring Cleavers, Scratch Grass, Grip Grass, Sweethearts, Cling Rascal;Galium spurium L;Galium vaillantii DC;Brittlestem hempnettle;Galium vaillantii Dc
- Galium hispidulum, Wild Madder;Rubia peregrina;Coastal Bedstraw;Bataprine hispidula (Michx) Nieuwl;Galium carolinianum FG Dietr;Galium hispidum Pursh;Galium peregrina (Walter) Britton, Sterns & Poggenb, non Franch;Rubia brownei Michx, non R Br;Rubia peregrina Walter, non L;Rubia walteri Dc;Valantia hypocarpia L, non R Br
- Galium murale, Small Bedstraw;Small Goosegrass;Small Goose-grass;Small Goosegrass, Small Bedstraw ;Sherardia muralis L;Yellow Wall Bedstraw
- Galium odoratum, Woodruff;Asperula odorata L;Sweetscented Bedstraw
- Galium tinctorium, Yellow Chamomile;Anthemis tinctoria;Stiff marsh bedstraw;Stiff Marsh Bedstraw;Asperula tinctoria L;Galium claytonii Michx
- Gamochaeta purpurea, Spike Cudweed;Gnaphalium purpureum L;Spoonleaf purple everlasting;Gnaphalium purpureum;Spoonleaf Purple Everlasting
- Gastridium ventricosum, Nitgrass;Nit Grass;Agrostis ventricosa Gouan;Milium lendigerum L;Gastridium lendigerum L Gaudin
- Gaudinia fragilis, Fragile Oat;Avena fragilis L;French Oat-grass
- Gaultheria shallon, Shallon;Gaultheria procumbens auct, non L;Salal
- Gazania rigens, Gazania;Othonna rigens L;Gorteria rigens L L;Treasureflower;Gazania rigens var uniflora (L f) Roessler;Gazania splendens hort ex Hend & AA Hend;Gazania uniflora (L f) Sims;Treasure-flower;Gazania splendens Lem
- Gelsemium sempervirens, Bignonia sempervirens L;Carolina yellow jasmine;Evening Trumpetflower;Carolina Jasmine;Carolina Jessamine;Carolina Yellow Jasmine;Carolina Yellow Jessamine;False Jessamine
- Genista monspessulana, Montpellier Broom;Canary Broom;Cytisus monspessulanus L;Cytisus monspessulana orth var SWLJacobs & JPickard sensu Jacobs, SWL & Pickard, J 1981;Teline monspessulana L KKoch;Genista canariensis L;Cytisus canariensis L Kuntze;Genista candicans L;Cytisus candicans L Lam;Teline maderensis Webb & Berthel;Genista maderensis Webb & Berthel Lowe;Teline monspessulana (L) K Koch;Genista monspessulanus;French broom
- Gentiana clusii, Trumpet Gentian;Ciminalis clusii (EP Perrier & Songeon) Holub;Gentiana acaulis sensu Lousley, non L
- Gentianella amarella, Autumn Gentian;Gentiana amarella L;Autumn dwarf gentian
- Gentianella campestris, Field Gentian;Gentiana campestris L;Gentianella baltica sensu EF Warb et auct, non (Murb) Börner;Gentianella campestris subsp baltica auct, non (Murb) Tutin
- Gentianella ciliata, Fringed Gentian;Gentiana ciliata L
- Geophila repens, Rondeletia repens L;Geophila reniformis DDon;Cephaelis reniformis Kunth;Corrida yerba de guava;Geophila herbacea
- Geranium himalayense, Himalayan Cranes-bill;Geranium grandiflorum auct, non L;Geranium pratense auct, non L
- Geranium versicolor, Pencilled Cranes-bill;Veiny Geranium;Geranium striatum L
- Glaucium corniculatum, Horned Poppy;Bristly Horned Poppy;Red Horned-poppy;Chelidonium corniculatum L;Glaucium phoeniceum Crantz;Blackspot hornpoppy
- Glaucium flavum, Yellow Horned Poppy;Chelidonium glaucium L;Glaucium luteum Scop;Glaucium leiocarpum Boiss;Yellow Horned-poppy;Yellow hornpoppy
- Glebionis coronaria, Crown Daisy;Chrysanthemum coronarium L
- Glebionis segetum, Chrysanthemum segetum L;Corn Marigold;Corndaisy
- Glinus oppositifolius, Slender Carpet-weed;Mollugo oppositifolia L;Mollugo spergula L;Glinus spergula L Steud
- Glossostigma diandrum, Limosella diandra L;Microcarpaea spathulata Hook
- Glyceria fluitans, Flote Grass;Manna Grass;Flote-grass;Manna grass;Festuca fluitans L;Poa fluitans L Scop;Melica fluitans L Raspail;Floating Sweet-grass;Water mannagrass
- Glyceria maxima, Reed;Reed Grass;Reed Sweet-grass;Water Meadow-grass;Reed Sweetgrass;Reed Sweet Grass;Water Meadowgrass;Molinia maxima Hartm;Poa aquatica L;Glyceria aquatica L Wahlb;Glyceria spectablis Mert & WDJKoch;Reed mannagrass
- Glycine max, Phaseolus max L;Soya-bean;Soybean
- Gnidia squarrosa, Daphne squarrosa L
- Gomphocarpus cancellatus, Broad-leaved Cottonbush;Broad-leaf Cotton-bush;Asclepias cancellata Burmf;Asclepias rotundifolia Mill;Asclepias arborescens L;Gomphocarpus arborescens L WTAiton
- Gomphocarpus fruticosus, Narrow-leaf Cotton-bush;Swan Plant;Narrowleaf Cottonbush;Asclepias fruticosa L
- Goodyera repens, Creeping Ladys-tresses;Satyrium repens L;Lesser rattlesnake plantain;Dwarf rattlesnake-plantain
- Graptophyllum pictum, Justicia picta L;Caricature-plant
- Groenlandia densa, Opposite-leaved Pondweed;Potamogeton densus L
- Gymnadenia conopsea, Fragrant Orchid;Orchis conopsea L;Habenaria conopsea (L) Benth
- Gypsophila pilosa, Turkish Babys-breath;Gypsophila porrigens (L) Boiss;Pseudosaponaria pilosa (Huds) Ikonn;Saponaria porrigens L
- Hackelochloa granularis, Pitscale Grass;Cenchrus granularis L;Mnesithea granularis (L) Koning & Sosef;Rytilix granularis (L) Skeels;Pitscale grass;Manisuris granularis
- Hedypnois rhagadioloides, Creten Weed;Cretan Weed;Cretin Weed;Hyoseris rhagadioloides L;Hedypnois polymorpha Dc
- Helianthemum apenninum, White Rock-rose;Cistus apenninus L;Helianthemum polifolium Mill
- Helianthemum nummularium, Common Rock-rose;Cistus nummularius L;Helianthemum chamaecistus Mill;Helianthemum vulgare Gaertn nom illegit;Helianthemum mutabile (Jacq) Moench
- Helianthemum oelandicum, Hoary Rock-rose;Cistus oelandicus L;Helianthemum canum (L) Hornem
- Helichrysum luteoalbum, Gnaphalium luteoalbum L;Gnaphalium luteo-album orth var L sensu Linnaeus, C 1753;Pseudognaphalium luteoalbum L Hilliard & BLBurtt;Pseudognaphalium luteo-album orth var Hilliard & BLBurtt sensu Hilliard, OM & Burtt, BL 1981;Gnaphalium luteoalbum var incanum ARich ex Endl;Gnaphalium luteo-album var incanum orth var Endl sensu Endlicher, SL 1833;Laphangium luteoalbum L Tzvelev;Laphangium luteo-album orth var Tzvelev sensu Tzvelev, NN 1994
- Heliconia bihai, Musa bihai L;Macawflower;Musa bihai;Heliconia humilis;Heliconia schaeferiana;Heliconia caribaea;Heliconia aurea
- Helictotrichon pratense, Meadow Oat-grass;Avena pratensis L;Avenochloa pratensis (L) Holub;Avenula pratensis (L) Dumort;Avenochloa pratensis (L) Holub
- Helminthostachys zeylanica, Flowering Fern;Osmunda zeylanica L;Kamraj
- Helminthotheca echioides, Ox-tongue;Picris echioides L;Helminthia echioides L Gaertn;Helmintia echioides orth var Gaertn sensu Gaertner, J 1791
- Helosciadium nodiflorum, Fools Cress, Water Celery;Sium nodiflorum L;Apium nodiflorum L Lag
- Hemerocallis fulva, Orange Day-lily;Hemerocallis lilioasphodelus var fulva L;Orange daylily;Tawny daylily;Hmrocalle fauve;Lis dun jour
- Hemerocallis lilioasphodelus, Yellow Day-lily;Hemerocallis flava L nom illegit;Hemerocallis lilioasphodelus var flava L;Yellow daylily;Lemon daylily
- Hepatica nobilis, Liverleaf;Anemone hepatica L;Hepatica
- Herminium monorchis, Musk Orchid;Ophrys monorchis L
- Herniaria glabra, Smooth Rupturewort;Herniaria hirsuta auct, non L;Smooth rupturewort
- Heteropogon contortus, Bunch Spear Grass;Bunch Speargrass;Black Speargrass;Bunch spear grass;Black speargrass;Andropogon brownii Kunth;Andropogon polystachyos Roxb;Heteropogon polystachyus Roxb Schult;Heteropogon polystachyus Roxb Nees;Heteropogon firmus JPresl;Andropogon contortus L;Andropogon contortus L var contortus;Andropogon contortus var genuinus Hack;Heteropogon hirtus Pers;Andropogon bellardi Bubani;Andropogon allionii Lam & Dc;Heteropogon allionii Lam & Dc Roem & Schult;Heteropogon glaber Pers;Andropogon contortus var glaber Pers Hack;Heteropogon roxburghii Arn ex Nees;Andropogon contortus subvar roxburghii Arn ex Nees Hack;Tanglehead;Ahedambo
- Heterozostera nigricaulis, Zostera muelleri Estuarine form sensu Robertson, EL 1984;Zostera muelleri Estuarine variety sensu Robertson, EL 1986;Zostera muelleri var Estuarine ELRobertson 13 Oct 1981 ELRobertson sensu Barker, WR, Barker, RM, Jessop, J & Vonow, H 2005;Zostera nigricaulis JKuo SWLJacobs & Les
- Hexastylis virginica, Virginia Heartleaf;Asarum memmingeri Ashe;Asarum virginicum L;Hexastylis memmingeri (Ashe) Small
- Hieracium anglicum, Hieracium cerinthoides auct, non L;Hieracium iricum auct, non Fr;Hieracium patens Dahlst;Hieracium subimpressum Dahlst
- Hieracium riddelsdellii, Hieracium ciliatum var venosum Ley;Hieracium venosum auct, non L
- Hierochloe odorata, Holy-grass;Anthoxanthum nitens (Weber) Y Schouten & Veldkamp;Holcus odoratus L;Sweetgrass
- Himantoglossum hircinum, Lizard Orchid;Orchis hircina (L) Crantz;Satyrium hircinum L
- Hippobroma longiflora, Lobelia longiflora L;Isotoma longiflora L CPresl;Laurentia longiflora L Endl;Laurentia longiflora L Peterm;Laurentia longiflora L EWimm;Madamfate;Lobelia longiflora;Isotoma longiflora;Laurentia longiflora
- Hippocrepis emerus, Scorpion Senna;Coronilla emerus L
- Hiptage benghalensis, Banisteria benghalensis L;Hiptage
- Hirschfeldia incana, Shortpod mustard;Brassica adpressa Boiss Synonym;Buchan Weed;Hairy Brassica;Hoary Mustard;Buchan weed;Brassica adpressa Boiss;Sinapis incana L;Brassica geniculata Desf Benth;Hirschfeldia adpressa Moench;Sinapis geniculata Desf;Brassica incana L Meigen;Brassica incana (L) Meigen non Ten
- Homogyne alpina, Purple Colts-foot;Tussilago alpina L
- Honckenya peploides, Sea Sandwort;Arenaria peploides L;Seaside sandplant
- Hordelymus europaeus, Wood Barley;Elymus europaeus L;Hordeum sylvaticum Huds nom illegit;Wood-barley
- Hordeum secalinum, Knotted Barley Grass;Critesion secalinum Schreb ALove;Meadow Barley;Critesion secalinum (Schreb) Á Löve;Hordeum nodosum auct, non L
- Hordeum vulgare, Six Row Barley;Six-row Barley;Six-rowed Barley;Hordeum distichon;Common barley;Common Barley;Hordeum aegiceras Nees ex Royle;Hordeum distichon L;Hordeum hexastichon L;Hordeum hexastichum L, orth var;Hordeum irregulare Aberg & Wiebe;Hordeum sativum Pers
- Hornungia petraea, Hutchinsia;Hutchinsia petraea (L) WT Aiton nom illegit;Lepidium petraeum L
- Hornungia procumbens, Oval Purse;Hymenolobus procumbens L Schinz & Thell;Lepidium procumbens L;Hutchinsia procumbens L Desv;Capsella procumbens L Fr;Capsella elliptica CAMey;Capsella procumbens var integrifolia Dc Rupr;Hutchinsia procumbens var integrifolia Dc;Stenopetalum incisifolium Hookf;Capsella australasica Hannaford;Capsella australasica FMuell sensu Mueller, FJH von 1853;Hutchinsia procumbens
- Huperzia phlegmaria, Common Tassel Fern;Coarse Tassel Fern;Lycopodium phlegmaria L;Lycopodium phlegmaria L var phlegmaria;Lycopodium phlegmaria var longibracteatum Domin
- Huperzia selago, Fir Clubmoss;Huperzia selago subsp arctica auct, non (Grossh ex Tolm) Á & D Löve;Lycopodium abietiforme Gray nom illegit;Lycopodium densum Lam nom illegit;Lycopodium selago L;Mirmau selago (L) HP Fuchs;Selago vulgaris Schur;Urostachys selago (L) Herter
- Hyacinthoides italica, Italian Bluebell;Scilla italica L
- Hyacinthoides non-scripta, Bluebell;Endymion non-scriptus (L) Garcke;Hyacinthus non-scriptus L;Scilla non-scripta (L) Hoffmanns & Link;English bluebell;Hyacinthoides nonscripta
- Hybanthus enneaspermus, Spade Flower;Viola enneasperma L;Calceolaria enneasperma L Kuntze;Pigea banksiana Ging ex Dc;Ionidium banksianum Ging ex Dc Steud;Viola suffruticosa L;Ionidium suffruticosum L Ging
- Hydrolea zeylanica, Nama zeylanica L
- Hymenocallis caribaea, Spider Lily;Pancratium caribaeum L;Caribbean spiderlily;Hymenocallis obtusata
- Hyparrhenia hirta, Tambookie Grass;Coolatai Grass;Coolati Grass;Andropogon hirtus L;Hyparrhenia quarrei Robyns;Thatching grass
- Hypericum hypericoides, Ascyrum hypericoides L;St Andrews Cross;Hypericum stragulum;Hypericum hypericoides
- Hypericum maculatum, Imperforate St Johns-wort;Hypericum quadrangulum sensu L(1754), non L(1753)Spotted St Johnswort
- Hypericum tetrapterum, Square-stalked St Johns-wort;Hypericum quadrangulum L
- Hypericum undulatum, Wavy St Johns-wort;Hypericum quadrangulum auct, non L
- Hyptis pectinata, Nepeta pectinata L;Comb bushmint;Afolava;Mesosphaerum pectinatum;Nepeta pectinata
- Hyptis suaveolens, Hyptis;Mint Bush;Ballota suaveolens L;Bystropogon suaveolens L LHer;Mesosphaerum suaveolens L Kuntze;Schaueria suaveolens L Hassk;Hyptis congesta Leonard;Hyptis shaferi Britton;Pignut;Shan xiang;Mesosphaerum suaveolens;Ballota suaveolens
- Ichnocarpus frutescens, Apocynum frutescens L;Ichnocarpus leptodictyus FMuell;Echites frutescens L Roxb
- Imperata cylindrica, Lalang;Blady Grass;Kunai in Papua New Guinea;Blady grass;Lagurus cylindricus L;Saccharum cylindricum L Lam;Imperata arundinacea Cirillo;Imperata koenigii var major Nees;Cogongrass;Cogon Grass;Japgrass;Bloodroot Grass;Red Barron
- Indigofera linnaei, Birdsville Indigo;Nine-leaved Indigo;Indigofera enneaphylla L;Hedysarum prostratum L sensu Linnaeus, C von 1767;Indigofera prostrata L Domin;Indigofera dominii HEichler;Anila prostrata L Kuntze
- Indigofera suffruticosa, Indigofera anil L;Indigofera tinctoria var brachycarpa Dc;Indigofera anil var polyphylla Dc;Indigofera micrantha Desv;Indigofera uncinata GDon;Indigofera anil var olygosperma Miq;Indigofera argentea var caerulea FMBailey;Anil de pasto;Indigofera anil;Anil De Pasto
- Indigofera tinctoria, Anila tinctoria L Kuntze;Anil tinctoria orth var ADChapm sensu Chapman, AD 1991;Indigofera argentea L;True indigo;Indigo
- Iphigenia indica, Anguillaria indica L RBr;Melanthium indicum L
- Ipomoea alba, Moon Flower;Ipomoea bona-nox L;Ipomoea ambigua Endl;Ipomoea carinata Endl;Ipomaea carinata orth var Endl sensu Endlicher, SL 1833;Calonyction aculeatum L House;Convolvulus aculeatus L;Calonyction bona-nox L Bojer;Ipomaea ambigua orth var Endl sensu Endlicher, SL 1833;Tropical white morning-glory;Calonyction aculeatum;Convolvulus aculeatus;Ipomoea bona-nox;Calonyction bona-nox;Moonflower;Tropical white morning glory
- Ipomoea batatas, Sweet Potato;Convolvulus batatas L;Sweet-potato;Sweetpotato;Convolvulus edulis;Convolvulus batatas;Batatas edulis;Sweet potato
- Ipomoea cairica, Mile a Minute;Coast Morning Glory;Ipomoea palmata Forssk;Convolvulus cairicus L;Ipomoea pendula RBr;Convolvulus pendulus RBr Spreng;Ipomoea tuberculata Desr Roem & Schult;Convolvulus tuberculata Desr;Ipomaea tuberculata orth var Roem & Schult sensu Roemer, JJ & Schultes, JA 1819;Mile a minute vine;Wu zhao jin long
- Ipomoea coptica, Convolvulus copticus L;Ipomoea dissecta Willd
- Ipomoea nil, Convolvulus nil L;Pharbitis nil L Choisy;Whiteedge morning-glory;Qian niu;Convolvulus nil
- Ipomoea obscura, Convolvulus obscurus L;Obscure morning-glory;Xiao xin ye shu
- Ipomoea pandurata, Convolvulus panduratus L;Man of the earth
- Ipomoea pes-caprae, Goats Foot Convolvulus;Convolvulus pes-caprae L;Convolvulus maritimus Lam;Ipomoea maritima Lam RBr;Plesiagopus rotundifolia Raf;Bayhops;Convolvulus pes-caprae
- Ipomoea plebeia, Bellvine;Convolvulus plebeius RBr Spreng;Convolvulus plebejus orth var Spreng;Convolvulus biflorus L;Ipomoea biflora RBr
- Ipomoea purpurea, Common Morning Glory;Small Morning Glory;Convolvulus purpureus L;Common Morning-glory;Tall morning-glory
- Ipomoea turbinata, Ipomoea muricata;Lilacbell;Calonyction muricatum (L) G Don;Convolvulus muricatus L;Ipomoea muricata (L) Jacq;Ipomoea petiolaris (Kunth) G Don
- Iris domestica, Belamcanda chinensis L Dc;Ixia chinensis L
- Iris orientalis, Iris ochroleuca L;Turkish Iris;Iris spuria subsp ochroleuca (L) Dykes;Yellowband iris;Yellow-Banded Iris
- Isolepis fluitans, Floating Club-rush;Floating Club Rush;Scirpus fluitans L;Scirpus fluitans L var fluitans;Eleogiton fluitans L Link;Scirpus fluitans var terrestris FMuell ex Benth;Scirpus fluitans var microstachya Benth;Isolepis lenticularis RBr;Scirpus lenticularis RBr Poir;Scirpus lenticularis RBr Spreng;Eleogiton fluitans
- Isolepis setacea, Scirpus setaceus L;Isolepis cumingii Steud;Isolepis margaritifera Nees;Scirpus margaritiferus Nees Boeckeler;Bristle Club-rush;Bristleleaf Bulrush;Schoenoplectus setaceus (L) Palla;Bristleleaf bulrush
- Ixoca quadrifida, Alpine Campion;Silene quadrifida;Cucubalus quadrifida L;Silene alpestris Jacq
- Jasminum sambac, Nyctanthes sambac L;Arabian jasmine;Mo li hua
- Jungermannia atrovirens, Aplozia atrovirens;Aplozia riparia;Haplozia atrovirens var sphaerocarpoidea;Haplozia atrovirens;Haplozia riparia var rivularis;Haplozia riparia var salevensis;Haplozia riparia;Haplozia sphaerocarpoidea;Haplozia tristis var rivularis;Haplozia tristis;Jungermannia atrovirens var sphaerocarpoidea;Jungermannia clavifolia;Jungermannia lanceolata L;Jungermannia potamophila;Jungermannia pumila var sphaerocarpoidea;Jungermannia riparia var bactrocalyx;Jungermannia riparia var rivularis;Jungermannia riparia;Jungermannia tristis var rivularis;Jungermannia tristis;Solenostoma atrovirens;Solenostoma lanceolata;Solenostoma sphaerocarpoideum;Solenostoma triste;Solenostoma tristis
- Jungermannia leiantha, Aplozia lanceolata;Jungermannia lanceolata non L;Liochlaena lanceolata
- Kerria japonica, Kerria;Rubus japonicus L;Japanese rose
- Kickxia elatine, Pointed Toadflax;Pointed Toad Flax;Linaria elatine L Mill;Antirrhinum elatine L;Sharp-leaved Fluellen;Linaria elatine (L) Mill;Sharpleaf cancerwort
- Kickxia spuria, Roundleaf Toadflax;Antirrhinum spurium L;Linaria spuria L Mill;Round-leaved Fluellen;Linaria spuria (L) Mill;Roundleaf cancerwort
- Knautia arvensis, Field Scabious;Scabiosa arvensis L;Field scabiosa
- Kniphofia uvaria, Red-Hot Poker;Red Hot Poker;Aloe uvaria L;Kniphofia alooides Moench;Red-hot-poker;Kniphofia alooides Moench nom illegit
- Koeleria macrantha, Crested Hair Grass;Crested Hair-grass;Aira cristata L;Aira macrantha Ledeb;Poa cristata L L;Koeleria australiensis Domin;Koeleria australiensis Domin var australiensis;Koeleria australiensis var maxima Domin;Koeleria velenovskyi Domin;Koeleria australiensis var typica Domin;Koeleria albescens auct, non Dc;Koeleria britannica (Domin ex Druce) Ujhelyi;Koeleria cristata auct, non (L) Pers;Koeleria glauca auct, non (Schrad) Dc;Koeleria gracilis Pers nom illegit;Koeleria macrantha subsp glauca auct, non (Schrad) PD Sell;Prairie Junegrass
- Lablab purpureus, Lablab Bean;Hyacinth Bean;Lablab;Dolichos purpureus L;Dolichos lablab L;Lablab-bean;Hyacinthbean;Dolichos lablab
- Lactuca serriola, Compass Plant;Prickly Lettuce;Milk Thistle;Lactuca scariola L;Prickly lettuce;Wild Lettuce, Milk Lettuce, Milk Thistle, Compass Plant, Wild Opium, English Thistle, Weed Milk Thistle, Horse Thistle
- Lactuca tatarica, Blue Lettuce;Sonchus tataricus L;Blue lettuce
- Lagenaria siceraria, Bottle Gourd;Lagenaria vulgaris Ser;Cucurbita siceraria Molina;White-flowered Gourd;Bottle gourd;Lagenaria lagenaria;Lagenaria vulgaris;Cucurbita siceraria;Cucurbita lagenaria;Cucurbita lagenaria L;Lagenaria leucantha Rusby
- Lallemantia peltata, Lions Heart;Dracocephalum peltatum L
- Lamarckia aurea, Feathery Barley Grass;Goldentop;Golden-top;Golden Lamarckia;Silver-grass;Golden-headed grass;Golden-Top;Cynosurus aureus L;Achyrodes aureum L Kuntze;Golden Dogs-tail;Goldentop grass
- Lamiastrum galeobdolon, Yellow Archangel;Galeobdolon luteum Huds;Galeopsis galeobdolon L;Lamium galeobdolon (L) L;Yellow archangel
- Lamium maculatum, Spotted Dead-nettle;Lamium album var maculatum L;Spotted henbit
- Lampranthus deltoides, Deltoid-leaved Dewplant;Oscularia deltoides;Mesembryanthemum deltoides L;Oscularia caulescens auct, non (Mill) Schwantes
- Lampranthus glaucus, Mesembryanthemum glaucum L
- Laportea interrupta, Urtica interrupta L;Fleurya interrupta L Wight;Fleurya interruptus Juss Gaudich;Hawaii woodnettle
- Larix decidua, European Larch;Larix europaea Dc nom illegit;Larix larix (L) H Karst;Larix pyramidalis Salisb nom illegit;Pinus larix L;European larch
- Lathyrus clymenum, Cicercha Purpurina;Lathyrus articulatus L
- Lathyrus grandiflorus, Two-flowered Everlasting-pea;Lathyrus tingitanus auct, non L
- Lathyrus linifolius, Bitter-vetch;Lathyrus linifolius var montanus (Bernh) Bässler;Lathyrus montanus Bernh;Lathyrus tuberosus auct, non L;Orobus linifolius Reichard;Orobus tuberosus L
- Lathyrus niger, Black Pea;Orobus niger L
- Leea indica, Bandicoot Berry;Staphylea indica Burmf;Aquilicia sambucina L;Leea sambucina L Willd
- Leersia oryzoides, Rice Cut Grass;Rice Cut-grass;Phalaris oryzoides L;Rice Cutgrass;Rice cutgrass
| - Legousia hybrida, Venuss-looking-glass;Campanula hybrida L;Specularia hybrida (L) A Dc
- Legousia speculum-veneris, Large Venuss-looking-glass;Campanula speculum-veneris L;European Venus Looking Glass;Githopsis latifolia Eastw;Specularia speculum-veneris (L) Tanfani
- Leonotis leonurus, Lions Ear;Lions Tail;Phlomis leonurus L;Lions ear
- Lepidium campestre, Field Cress;Mithridate Pepperwort;Thlaspi campestre L;Field Pepperwort;Field pepperweed;Wood Rush
- Lepidium squamatum, Nasturtium verrucarium Garsault;Coronopus squamatus Forssk Asch;Coronopus procumbens Gilib;Senebiera coronopus L Poir;Coronopus ruellii All;Coronopus verrucarius Garsault Muschl & Thell;Coronopus verrucarius Garsault Muschl & Thell subsp verrucarius;Coronopus verrucarius subsp euverrucarius Muschl;Cochlearia coronopus L
- Leptochloa fusca, Festuca fusca L;Diplachne fusca L PBeauv ex Roem & Schult;Diplachne fusca L Stapf;Uralepis fusca L Steud;Triodia ambigua RBr;Festuca reptatrix L;Diplachne reptatrix L Druce;Uralepis drummondii Steud;Brown Beetle-grass;Leptochloa muelleri;Diplachne fusca (L) P Beauv ex Roem & Schult;Malabar sprangletop
- Lespedeza juncea, Perennial Lespedeza;Hedysarum junceum L
- Lessertia frutescens, Colutea frutescens L;Sutherlandia frutescens L RBr
- Leucaena leucocephala, Coffee Bush;Lead Tree;Lead tree;Koa haole;Vi vi;Leucaena;Sneaky Tree;Leucaena glauca Willd Benth;Mimosa leucocephala Lam;Acacia leucocephala Lam Link;Mimosa glauca L;Acacia glauca Willd;White leadtree;Acacia leucocephala;Mimosa leucocephala;White Leadtree;Leucaena glauca
- Leucanthemella serotina, Autumn Oxeye;Chrysanthemum serotinum L;Chrysanthemum uliginosum (Waldst & Kit ex Willd) Pers;Giantdaisy;Chrysanthemum uliginosum Pers;Leucanthemum serotinum (L) Stankov;Tanacetum serotinum (L) Sch Bip
- Leucanthemum vulgare, Ox-eye daisy;Oxene Daisy;Oxeye Daisy;Chrysanthemum leucanthemum L;Oxeye daisy;Chrysanthemum leucanthemum
- Leucas zeylanica, Phlomis zeylanica L;Phlomis indica L;Leucas indica L RBr;Leucas indica RBr sensu Brown, R 1810
- Leymus arenarius, Lyme Grass;Elymus arenarius L;Lyme-grass;Sand ryegrass
- Limonium sinuatum, Perennial Sea Lavender;Notched or Perennial Sea-lavender;Perrenial Sea-lavender;Notch-leaf Sea-lavender;Statice sinuata L;Statice;Wavyleaf sea lavender
- Limonium vulgare, Common Sea-lavender;Statice limonium L;Mediterranean Sea Lavender
- Linaria arvensis, Corn Toadflax;Antirrhinum arvense L
- Linaria dalmatica, Antirrhinum dalmaticum L;Linaria genistifolia subsp dalmatica L Maire & Petitm;Balkan Toadflax;Linaria genistifolia subsp dalmatica (L) Maire & Petitm;Dalmatian toadflax
- Linaria pelisseriana, Pelissers Toadflax;Antirrhinum pelisserianum L;Jersey Toadflax
- Linaria purpurea, Purple Toadflax;Antirrhinum purpureum L;Purple toadflax
- Linaria repens, Pale Toadflax;Antirrhinum repens L;Striped toadflax
- Linaria supina, Prostrate Toadflax;Antirrhinum supinum L;Lesser butter and eggs
- Lindernia antipoda, Ruellia antipoda L;Gratiola veronicifolia Retz;Bonnaya veronicifolia Retz Spreng;Bonnaya veronicaefolia orth var Spreng sensu Sprengel, CPJ 1824;Lindernia veronicifolia Retz FMuell;Ilysanthes veronicifolia Retz Urb;Sparrow false pimpernel
- Lindernia crustacea, Capraria crustacea L;Vandellia crustacea L Benth;Pyxidaria crustacea L Kuntze;Torenia flaccida RBr;Torenia scabra RBr;Tittmannia scabra RBr Spreng;Vandellia brownii Benth;Malaysian false pimpernel;Buchnera capillaris;Vandellia crustacea;Malaysian False Pimpernel;Torenia crustacea (L) Cham & Schltdl
- Lindernia hyssopoides, Gratiola hyssopoides L
- Linum trigynum, French Flax;Linum gallicum L;French flax
- Liparis loeselii, Fen Orchid;Ophrys loeselii L;Yellow widelip orchid;Loesels Twayblade;Green Twayblade
- Listera cordata, Lesser Twayblade;Ophrys cordata L;Heartleaf twayblade;Heart-Leaved Twayblade
- Listera ovata, Common Twayblade;Ophrys ovata L;Eggleaf twayblade;Egg-Leaved Twayblade
- Littorella uniflora, Shoreweed;Plantago uniflora L;American shoreweed
- Lloydia serotina, Snowdon Lily;Bulbocodium serotinum L;Common alplily
- Lobularia maritima, Sweet alyssum;Panalillo Mexico;Aliso Mexico;Arrocillo Mexico;Sweet Alyssum;Sweet Alice;Alyssum maritimum L Lam;Clypeola maritima L;Alyssum minimum L ex Pall;Koniga maritima L RBr;Sweet Alison;Alyssum maritimum (L) Lam
- Logfia arvensis, Field Cudweed;Filago arvensis;Field Cottonrose;Filago arvensis L;Gnaphalium arvense L, nom inval;Oglifa arvensis L Cass
- Logfia gallica, Filago gallica L;Narrow-leaved Cudweed;Filago gallica;Oglifa gallica (L) Chrtek & Holub;Narrowleaf cottonrose;Narrowleaf Cottonrose;Oglifa gallica (L) Chrtek & Holub
- Loiseleuria procumbens, Trailing Azalea;Azalea procumbens L;Alpine azalea
- Lotus tenuis, Slender Birds-foot Trefoil;Lotus corniculatus var tenuifolius L;Lotus tenuifolius L CPresl
- Ludwigia adscendens, Jussiaea repens L;Jussiaea adscendens L
- Ludwigia octovalvis, Willow Primrose;Oenothera octovalvis Jacq;Jussiaea suffruticosa L;Jussiaea villosa Lam;Jussiaea suffruticosa var villosa Lam Kuntze;Jussiaea suffruticosa var angustifolia Lam Kuntze;Jussiaea suffruticosa var octofila Dc HLev;Jussiaea octonervia var sessiliflora Micheli Micheli;Jussiaea suffruticosa f genuina Domin;Jussiaea suffruticosa var acuminata Domin;Jussiaea suffruticosa var brevifolia Domin;Jussiaea suffruticosa var interstans Domin;Jussiaea suffruticosa f latifrons Domin;Jussiaea suffruticosa var linearifolia Domin;Jussiaea suffruticosa var angustifolia FMBailey;Mexican primrose-willow;Oenothera octovalvis;Jussiaea octonervia;Jussiaea suffruticosa;Jussiaea suffruticosa var octofila;Jussiaea suffruticosa var ligustrifolia;Mexican Primrose-willow
- Ludwigia palustris, Marsh Ludwigia;Isnardia palustris L;Hampshire-purslane;Marsh seedbox;Marsh Seedbox;Common Water-purslane
- Ludwigia peruviana, Jussiaea peruviana L;Peruvian primrose-willow;Jussiaea peruviana;Peruvian Primrose-willow
- Luffa aegyptiaca, Native Towel-gourd;Luffa cylindrica MRoem;Momordica cylindrica L;Luffa insularum AGray;Luffa cylindrica var insularum AGray Cogn;Luffa cylindrica var leiocarpa Naudin;Luffa leiocarpa Naudin FMuell;Luffa cylindrica var multiflora Spreng Domin;Luffa cylindrica L MRoem;Momordica luffa L;Sponge gourd
- Lunularia cruciata, Marchantia cruciata L;Lunularia vulgaris Micheli ex Raddi;Lunularia michelii;Lunularia vulgaris;Marchantia cruciata
- Luronium natans, Floating Water-plantain;Alisma natans L
- Luzula campestris, Field Woodrush;Glowworm Grass;Juncus campestris L;Juncoides campestris Dc Kuntze;Juncodes campestre orth var sensu Kuntze, CEO 1891;Field Wood-rush;Field woodrush
- Luzula pilosa, Hairy Wood-rush;Juncus pilosus L
- Luzula spicata, Spiked Wood-rush;Juncus spicatus L;Spiked woodrush
- Lychnis coronaria, Rose Campion;Dusty Miller, Rose Campion;Rose Campion, Mullein Pink;Agrostemma coronaria L;Silene coronaria L Clairv;Silene coronaria (L) Clairv;Rose campion;Silene coronaria
- Lycium chinense, Chinese Teaplant;Lycium barbarum auct, non L;Chinese desert-thorn
- Lycopersicon esculentum, Tomato;Solanum lycopersicum L;Fan qie
- Lycopodiella cernua, Club Moss;Scrambling Clubmoss;Coral Fern;Lycopodium cernuum L;Staghorn clubmoss;Lycopodium cernuum;Lepidotis cernua;Palhinhaea cernua;Palhinhaea capillacea;Lycopodium cernuum var capillaceum;Lycopodium capillaceum;Lycopodium cernuum L var cernuum
- Lycopodiella inundata, Marsh Clubmoss;Lepidotis inundata (L) P Beauv;Lycopodium inundatum L;Lycopodium palustre Lam nom illegit;Inundated clubmoss
- Lycopodium alpinum, Alpine Clubmoss;Diphasiastrum complanatum subsp alpinum (L) Jermy;Diphasium alpinum (L) Rothm;Diphasiastrum alpinum;Lycopodium chamaecyparissus sensu Druce, non A Braun ex Mutel;Lycopodium complanatum sensu Druce et auct, non L;Lycopodium complanatum subsp alpinum (L) Hook f;Diphasiastrum alpinum (L) Holub;Diphasium alpinum (L) Rothm
- Lygodium flexuosum, Ophioglossum flexuosum L;Ophioglossum scandens L;Lygodium scandens L Sw;Lygodium semibipinnatum RBr;Hydroglossum scandens L Willd;Climbing Fern
- Lysimachia arvensis, Anagallis arvensis L;Anagallis arvensis L subsp arvensis;Anagallis arvensis L var arvensis;Anagallis arvensis L f arvensis;Anagallis caerulea L;Anagallis arvensis var caerulea Gouan;Anagallis phoenicea Scop;Anagallis carnea Schrank;Anagallis parviflora Hoffmanns & Link;Anagallis arvensis f carnea Schrank Schinz & RKeller;Anagallis arvensis var phoenicea Gouan
- Lysimachia ciliata, Fringed Loosestrife;Lysimachia punctata auct, non L;Steironema ciliatum (L) Baudo;Fringed loosestrife
- Lysimachia minima, Centunculus minimus L;Anagallis minima L EHLKrause;Anagallis centunculus Afzel
- Lysimachia punctata, Dotted Loosestrife;Lysimachia ciliata auct, non L;Lysimachia verticillaris Spreng;Large yellow loosestrife
- Lysimachia terrestris, Lake Loosestrife;Viscum terrestre L;Earth loosestrife
- Lythrum portula, Water-purslane;Peplis portula L;Spatulaleaf loosestrife
- Macaranga tanarius, Nasturtium Tree;Davids Heart;Blush Macaranga;Kayu Merah;Hairy Mahang;Ricinus tanarius L;Mappa tanarius L Blume;Mappa tanaria orth var Baill sensu Baillon, HE 1866;Macaranga tanaria var glabra orth var FMuell sensu Mueller, FJH von 1868;Mappa tomentosa Blume;Macaranga tomentosa Blume Druce;Parasol leaf tree
- Macfadyena unguis-cati, Cats Claw Creeper;Bignonia unguis-cati L;Doxantha unguis-cati L Miers;Bignonia tweediana Lindl;Catclawvine;Bignonia unguis-cati;Batocydia unguis-cati (L) Mart ex Britton;Doxantha unguis-cati (L) Miers
- Macroptilium lathyroides, Phasey Bean;Phaseolus lathyroides L;Wild bushbean;Phaseolus lathyroides;Wild Bushbean
- Maianthemum bifolium, May Lily;Convallaria bifolia L;Wu he cao
- Maianthemum stellatum, Star-flowered Lily-of-the-valley;Smilacina stellata;Starry false lily of the valley;Little false solomons-seal;Starflower solomons-seal;Starry False Lily Of The Valley;Convallaria stellata L;Smilacina liliacea (Greene) Wynd;Smilacina sessilifolia Nutt ex Baker;Smilacina stellata (L) Desf;Vagnera liliacea (Greene) Rydb;Vagnera sessilifolia (Nutt ex Baker) Greene;Vagnera stellata (L) Morong
- Malaxis paludosa, Bog Orchid;Hammarbya paludosa;Ophrys paludosa L;Bog adders-mouth orchid;Bog Adders-Mouth-Orchid;Bog Adders-mouth Orchid;Hammarbya paludosa (L) Kuntze
- Malcolmia maritima, Virginia Stock;Cheiranthus maritimus L;Virginia stock
- Malus pumila, Apple;Pyrus malus L;Malus x domestica Borkh;Malus domestica Borkh nom illegit;Malus sylvestris subsp mitis (Wallr) Mansf;Paradise apple;Malus domestica
- Malus sylvestris, Crab Apple;Pyrus malus var sylvestris L;European crab apple;Pyrus malus
- Malva neglecta, Dwarf Mallow;Malva rotundifolia sensu L(1754) et auct, non L(1753)Common mallow
- Malva pusilla, Small Mallow;Malva rotundifolia L;Low mallow
- Manihot esculenta, Ubi Kayu;Manioc;Cassava;Tapioca;Jatropha manihot L;Manihot diffusa;Manihot dulcis;Manihot utilissima;Jatropha manihot
- Manilkara kauki, Mimusops kauki L;Mimusops kauki var browniana ADc;Mimusops browniana ADc Benth
- Mantisalca salmantica, Mantisalca;Centaurea salmantica L;Microlonchus salmanticus L Dc;Dagger flower
- Marrubium peregrinum, Horehound;Marrubium candidissimum L
- Matthiola incana, Gilliflower;Common Stock;Cheiranthus incanus L;Hoary Stock;Tenweeks stock
- Matthiola sinuata, Sea Stock;Cheiranthus sinuatus L
- Meconopsis cambrica, Welsh Poppy;Papaver cambricum L
- Medicago arabica, Spotted Medic;Spotted Burr Medic;Spotted Medick;Spotted-leaf Medic;Medicago polymorpha var arabica L;Medicago maculata Sibth;Medicago maculata Willd;Spotted medick
- Medicago laciniata, Cut-leaved Medic;Cutleaf Medic;Toothed Medic;Cut-leaf Medic;Medicago polymorpha var laciniata L;Tattered Medick;Trigonella laciniata;Medicago aschersoniana Urb;Cutleaf medick;Cutleaf Medick;Trigonella laciniata auct non L
- Medicago minima, Burr Medic;Woolly Burr Medic;Little Medic;Small Burr Medic;Little Burr Medick;Small Medic;Kalgoorlie Clover;Woolly Trefoil;Woolly Burr;Little Burr Clover;Goldfields Medic;Small Woolly Burr Medic;Medicago polymorpha var minima L;Bur Medick;Little bur-clover
- Medicago monspeliaca, Star-fruited Fenugreek;Trigonella monspeliaca;Hairy Medick;Trigonella monspeliaca L
- Medicago orbicularis, Button Medic;Flat Snail Clover;Burrless Clover;Button Clover;Medicago polymorpha var orbicularis L;Button Medick;Blackdisk Medick
- Medicago sativa, Lycerne;Alfalfa;Lucerne;Lucern;Medicago caerulea Less ex Ledeb;Medicago falcata L
- Melaleuca leucadendra, Weeping Tea tree;Long leaved Paperbark;Cadjeput;Butterscotch Paperbark;Brown Tea tree;Broad leaved Paperbark;Weeping Teatree;Weeping Paperbark;River Tea tree;Broad leaved Tea tree;Cajupet;Brown Tea-tree;Broad-leaved Tea-tree;Weeping Tea-tree;Melaleuca leucadendron orth var orth var Lf var leucadendron sensu Linnaeus, C filius 1782;Myrtus leucadendra L;Leptospermum leucodendron L JRForst & GForst;Melaleuca latifolia Raeusch sensu Raeuschel, EA 1797;Metrosideros coriacea Salisb;Cajuputi leucadendron L Rusby ex ALyons;Melaleuca mimosoides ACunn ex Schauer;Melaleuca leucadendron var mimosoides orth var Cheel sensu Ewart, AJ & Davies, OB 1917
- Melanthera biflora, Verbesina biflora L;Wedelia biflora L Dc;Wollastonia biflora L Dc;Niebuhria biflora L Britten;Buphthalmum uniflorum GForst;Buphthalmum uniflorum GForst ex Willd;Wedelia uniflora GForst ex Willd WRBOliv;Wedelia forsteriana Endl;Wollastonia forsteriana Endl Dc
- Melanthera nivea, Snow squarestem;Echinocephalum discoideum;Bidens nivea;Melanthera aspera;Calea aspera;Snow Squarestem;Bidens nivea L;Melanthera carpenteri Small;Melanthera hastata Michx
- Melilotus indicus, Californian Lucern;King Island Melilot;Scented Meliliot;Hexham Scent;Sweet Melilot;King Island Clover;Californian Lucerne;Common Melilot;Bokhara Clover;Small Melilot;Indian Clover;Melilotus Senji;Sour Clover;Annual Yellow Sweetclover;Trifolium indica L;Melilotus parviflorus Desf;Melilotus parviflora orth var Desf sensu Desfontaines, RL 1798;Trifolium indicum L;Annual yellow sweetclover
- Melilotus officinalis, Common Melilot;Trifolium officinale L;Trifolium officinalis orth var L sensu Linnaeus, C 1753;Ribbed Melilot;Melilotus albus;Melilotus arvensis Wallr nom illegit;Yellow sweetclover;Melilotus alba;Yellow Sweetclover;Melilotus alba Medikus, orth var;Melilotus albus Medik;Melilotus arvensis Wallr;Melilotus leucanthus WDJ Koch ex Dc;Melilotus lutea Gueldenst
- Melilotus siculus, Messima;Mediterranean Melilot;Trifolium siculum Turra;Trifolium sicula orth var Turra sensu Turra, A 1765;Trifolium messanensis L;Melilotus messanensis L All
- Mentha arvensis, Corn Mint;Mentha gentilis L;Wild mint
- Mentha longifolia, Mentha spicata var longifolia L
- Mentha spicata, Spear Mint;Spearmint;Garden Mint;Mentha longifolia auct, non (L) Huds;Mentha scotica RA Graham;Mentha cordifolia auct;Mentha longifolia auct non (L) Huds;Mentha sylvestris L;Mentha viridis L
- Mentha x rotundifolia, Round-leaved Mint;Apple Mint;Mentha spicata var x rotundifolia L
- Merremia aegyptia, Ipomoea aegyptia L;Convolvulus pentaphyllus L sensu Linnaeus, C 1762;Ipomoea pentaphylla Jacq;Merremia pentaphylla Jacq Hallier f;Hairy woodrose
- Merremia hirta, Convolvulus hirtus L;Convolvulus caespitosus Roxb;Merremia caespitosa Roxb Hallier f;Skinneria caespitosa Roxb Choisy;Ipomoea linifolia Blume
- Merremia peltata, Convolvulus peltatus L;Ipomoea peltata L Choisy;Operculina peltata L Hallier f;Merremia nymphaeifolia Hallier f;Ipomoea nymphaeifolia Blume;Ipomoea menispermacea Domin;Fue Vao;Agon;Lagun;Pui;Wachathal
- Merremia quinquefolia, Ipomoea quinquefolia L;Rock rosemary;Ipomoea quinquefolia;Convolvulus quinquefolius;Merremia parviflora
- Merremia tuberosa, Ipomoea tuberosa L;Spanish arborvine
- Merremia umbellata, Convolvulus umbellatus L;Hogvine;Convolvulus umbellatus;Ipomoea mollicoma;Convolvulus caracassanus;Ipomoea polyanthes
- Mertensia maritima, Oysterplant;Pulmonaria maritima L;Oysterleaf
- Metzgeria furcata, Jungermannia furcata L;Jungermannia furcatum orth var L sensu Linnaeus, C 1753;Metzgeria decipiens CMassal Schiffn & Gottsche;Metzgeria glaberrima Steph;Metzgeria howeana Steph;Metzgeria densiseta Steph;Metzgeria pinnata Steph;Metzgeria grollei Kuwah;Apertithallus orientalis;Jungermannia furcata;Metzgeria amakawae;Metzgeria campbelliensis;Metzgeria capensis;Metzgeria crassipaginula;Metzgeria crispula;Metzgeria decipiens;Metzgeria densiseta;Metzgeria fauriana;Metzgeria furcata var decipiens;Metzgeria furcata var flexipilis;Metzgeria furcata var ulvula;Metzgeria glaberrima;Metzgeria grollei;Metzgeria howeana;Metzgeria involvens;Metzgeria liaoningensis;Metzgeria lutescens;Metzgeria marionensis;Metzgeria mitrata;Metzgeria nicomariei;Metzgeria nuda;Metzgeria oligotricha;Metzgeria orientalis;Metzgeria perrotana;Metzgeria philippinensis;Metzgeria pinnata;Metzgeria planifrons;Metzgeria planiuscula;Metzgeria quadriseriata;Metzgeria ruwenzorensis;Metzgeria tabularis;Metzgeria vittii
- Mibora minima, Early Sand-grass;Agrostis minima L;Early sandgrass
- Micrococca mercurialis, Tragia mercurialis L
- Microlepia speluncae, Polypodium speluncae L;Aspidium speluncae L Willd;Davallia speluncae L Baker;Davallia flaccida RBr;Trichomanes flaccida RBr Poir;Microlepia flaccida RBr JSm;Dicksonia polypodioides Sw;Limpleaf fern
- Microsorum punctatum, Acrostichum punctatum L;Polypodium punctatum L Sw;Polypodium irioides Poir;Pleopeltis irioides Poir TMoore;Polypodium irioides f cristatum FMBailey FMBailey;Polypodium irioides Poir var irioides;Polypodium punctatum f cristatum FMBailey Domin
- Microsorum scolopendria, Phymatosorus scolopendria Burmf PicSerm;Polypodium phymatodes L;Pleopeltis phymatodes L TMoore;Phymatodes scolopendria Burmf Ching;Polypodium scolopendria Burmf;Phymatodes phymatodes L Maxon;Monarch fern;Phymatosaurus scolopendria;Phymatosoros scolopendria
- Microstachys chamaelea, Tragia chamaelea L;Excoecaria chamaela L Baill;Excaecaria chamaela orth var Baill sensu Baillon, HE 1866;Sebastiania chamaelea L MullArg;Elachocroton asperococcum FMuell;Stillingia asperococca FMuell Baill
- Millettia pinnata, Cytisus pinnatus L;Millettia novoguineensis Kaneh & Hatus;Pongamia glabra Vent;Pongamia pinnata var typica Domin;Pongame oiltree
- Mimulus guttatus, Monkeyflower;Mimulus luteus auct, non L;Seep monkeyflower
- Minuartia sedoides, Cyphel;Arenaria sedoides (L) F Hanb;Cherleria sedoides L
- Minuartia verna, Spring Sandwort;Arenaria verna L
- Misopates orontium, Lesser Snapdragon;Lesser Snapdragons;Antirrhinum orontium L;Weasels-snout;Linearleaf snapdragon
- Mitracarpus hirtus, Spermacoce hirta L;Tropical girdlepod;Mitracarpus villosus;Spermacoce longifolia;Spermacoce aspera;Mitracarpus breviflorus;Tropical Girdlepod;Mitracarpus villosus (Sw) Cham & Schltdl ex Dc
- Mitreola petiolata, Mitreola oldenlandioides Wall ex Dc;Ophiorrhiza mitreola L;Cynoctonum petiolatum JFGmel;Anonymos petiolata Walter;Lax hornpod;Cynoctonum mitreola;Lax Hornpod;Cynoctonum mitreola (L) Britton;Cynoctonum succulentum RW Long
- Mnesithea granularis, Cenchrus granularis L;Manisuris granularis L Lf;Manisuris granularis L Sw;Rottboellia granularis L Roberty;Hackelochloa granularis L Kuntze
- Moehringia trinervia, Three-nerved Sandwort;Arenaria trinervia L;Apetalous Sandwort;Apetalous sandwort
- Moenchia erecta, Erect Chickweed;Upright Chickweed;Erect Chickweed, Upright Moenchia;Sagina erecta L;Cerastium quaternellum Fenzl;Upright chickweed
- Molineriella minuta, Small Hairgrass;Small Hair-grass;Aira minuta L;Airopsis minuta L Desv;Molineria minuta L Parl;Periballia minuta L Asch & Graebn
- Molinia caerulea, Purple Moor-grass;Aira caerulea L;Purple moorgrass
- Mollugo cerviana, Wire-stem chickweed;Wire-stem Chickweed;Pharnaceum cervianum L;Threadstem carpetweed
- Moneses uniflora, One-flowered Wintergreen;Pyrola uniflora L;Single delight
- Monochoria hastata, Pontederia hastata L;Arrow-leaf Monochoria
- Morella pensylvanica, Bayberry;Myrica pensylvanica;Myrica caroliniensis auct, non Mill;Myrica cerifera auct, non L;Northern bayberry
- Moricandia arvensis, Violet Cabbage;Purple Mistress;Brassica arvensis L
- Mucuna pruriens, Cow Itch;Velvet Bean;Dolichos pruriens L;Cowitch;Coffeekinshasacongo;Dolichos pruriens;Stizolobium pruriens
- Muraltia heisteria, Furze Muraltia;Polygala heisteria L
- Murdannia nudiflora, Commelina nudiflora L;Aneilema nudiflorum L Sweet;Aneilema nudiflora orth var Sweet sensu Sweet, R 1826;Nakedstem dewflower;Commelina nudiflora;Naked-Stemmed Dewflower
- Murdannia vaginata, Commelina vaginatum L;Aneilema vaginatum L RBr;Aneilema vaginatum L Wall;Aneilema vaginata orth var Wall sensu Wallich, N 1831
- Murraya koenigii, Curry Leaf;Bergera koenigii L
- Murraya paniculata, Chinese Box;Jessamine;Orange Jasmine;Orange Jessamine;Chalcas paniculata var zollingeri Tanaka;Chalcas paniculata L;Murraya scandens Hassk;Murraya exotica L;Murraya exotica L var exotica;Camunium exoticum L Kuntze;Chalcas exotica L Millsp;Murraya heptaphylla Span;Camunium heptaphyllum Span Kuntze;Murraya exotica var ovatifoliolata Engl;Murraya ovatifoliolata Engl Domin;Murraya exotica
- Muscari botryoides, Compact Grape-hyacinth;Hyacinthus botryoides L;Common grape hyacinth;Common grape-hyacinth;Muscari
- Muscari comosum, Tufted Grape Hyacinth;Leopoldia comosa L Parl;Hyacinthus comosus L sensu Linnaeus, C 1753;Tassel Hyacinth;Hyacinthus comosus L;Tassel grape hyacinth;Tassel Grape-Hyacinth
- Mycelis muralis, Wall Lettuce;Lactuca muralis (L) Gaertn;Prenanthes muralis L;Wall-lettuce;Prenanthes muralis;Lactuca muralis
- Myosotis arvensis, Common Forget-me-not;Myosotis scorpioides var arvensis L;Field Forget-me-not;Myosotis arvensis subsp umbrata (Mert & WDJ Koch) O Schwarz;Field forget-me-not
- Myosoton aquaticum, Water Chickweed;Cerastium aquaticum L;Stellaria aquatica (L) Scop;Giantchickweed
- Myrrhis odorata, Sweet Cicely;Scandix odorata L;Anise
- Narthecium ossifragum, Bog Asphodel;Anthericum ossifragum L
- Nasturtium officinale, Water-cress;Rorippa nasturtium-aquaticum;Sisymbrium nasturtium-aquaticum L;Watercress
- Nauclea orientalis, Soft Leichhardt;Cheesewood;Leichhardt Pine;Yellow Cheesewood;Leichhardts Pine;Leichhardt Pine ;Canary Cheesewood;Leichhardt Tree;Cephalanthus orientalis L;Bancalus orientalis L Kuntze;Sarcocephalus orientalis L Merr;Nauclea coadunata Roxb ex Sm;Sarcocephalus coadunatus Roxb ex Sm Druce;Sarcocephalis coadunatus orth var Druce sensu Druce, GC 1917;Nauclea cordata Roxb;Nauclea cordata Roxb sensu Roxburgh, William 1814;Platanocarpum cordatum Roxb Korth;Sarcocephalus cordatus Roxb Miq;Nauclea undulata Roxb;Nauclea undulata Roxb sensu Roxburgh, William 1814;Sarcocephalus undulatus Roxb Miq;Nauclea macrophylla Blume;Nauclea grandifolia Dc;Bancalus grandifolius Kuntze;Nauclea glaberrima Bartl ex Dc;Sarcocephalus glaberrimus Bartl ex Dc Miq;Nauclea roxburghii GDon sensu Don, G 1834;Nauclea wallichiana RBr ex GDon;Cadamba nocturna Buch-Ham sensu Buchanan-Hamilton, F 1827;Sarcocephalus leichhardiitii orth var FMuell sensu Mueller, FJH von 1860;Sarcocephalus leichhardtii FMuell sensu Mueller, FJH von 1860;Sarcocephalus papagola Domin;Nauclea leichardtii Ridsdale sensu Ridsdale, CE 1979
- Neatostema apulum, Hairy Sheepweed, Blackweed;Hairy Sheepweed;Myosotis apula L;Lithospermum apulum L Vahl;Rhytispermum apulum L Link
- Nelumbo nucifera, Pink Lotus-lily;Pink Waterlily;Lotus Lily;Nangram Lily;Pink Water Lily;Lotus;Sacred Lotus;Nymphaea nelumbo L;Nelumbo speciosa Willd;Nelumbo speciosa var alba FMBailey;Nelumbium speciosum var alba orth var FMBailey;Nelumbium speciosum orth var Willd;Sacred lotus;Nelumbium nelumbo (L) Druce;Nelumbium speciosum Willd, orth var
- Neottia nidus-avis, Birds-nest Orchid;Ophrys nidus-avis L
- Nephrolepis cordifolia, Sword Fern;Herringbone Fern;Fishbone Fern;Pop-Rock Fern;Fishbone fern;Aspidium tuberosum Bory ex Willd;Nephrolepis tuberosa Bory ex Willd CPresl sensu Hooker, JD 1864;Nephrolepis radicans var cavernicola Domin;Aspidium volubile var cavernicolum Domin FMBailey;Polypodium cordifolium L;Aspidium cordifolium L Sw;Aspidium cordifolium var tambourinense Domin FMBailey;Nephrolepis auriculata L Trimen;Narrow swordfern;Nephrolepis pendula;Aspidium pendulum
- Nerine sarniensis, Amaryllis sarniensis L;Guernsey Lily
- Neslia paniculata, Ball Mustard;Myagrum paniculatum L;Ballmustard
- Nicandra physalodes, Apple of Peru;Atropa physalodes L;Apple-of-Peru
- Noltea africana, Noltea;Ceanothus africanus L;Willemetia africana L Brongn
- Nuphar lutea, Yellow Water-lily;Nymphaea lutea L;Yellow pond-lily;Spatterdock;Bullhead water-lily;Nuphar advena
- Nuttallanthus canadensis, Antirrhinum canadense L;Linaria canadensis L DumCours;Linaria canadensis L DumCours var canadensis;Canada toadflax;Old-field toadflax;Linaria canadensis
- Nymphoides indica, Water Snowflake;Snowflake Marshwort;Menyanthes indica L;Limnanthemum indicum L Thwaites;Villarsia trachysperma FMuell;Water snowflake;Jin yin lian hua;Nymphoides indica subsp occidentalis;Nymphoides humboldtianum;Nymphoides humboldtiana
- Ocimum basilicum, Sweet Basil;Sweet basil;Luo le;Kemangi;Ocimum
- Ocimum tenuiflorum, Sacred Basil;Holy Basil;Sacred Basil, Holy Basil;Ocimum sanctum L;Ocymum sanctum orth var L sensu Linnaeus, C von 1767;Ocimum anisodorum FMuell;Ocimum caryophyllinum FMuell;Ocimum sanctum var angustifolium Benth
- Oenanthe aquatica, Fine-leaved Water-dropwort;Phellandrium aquaticum L;Fineleaf waterdropwort
- Oenothera cambrica, Small-flowered Evening-primrose;Oenothera ammophila auct, non Focke;Oenothera novae-scotiae auct, non RR Gates;Oenothera parviflora auct, non L
- Omalotheca supina, Dwarf Cudweed;Gnaphalium supinum;Alpine arctic cudweed;Alpine Arctic Cudweed;Gnaphalium supinum L
- Omalotheca sylvatica, Heath Cudweed;Gnaphalium sylvaticum;Woodland arctic cudweed;Woodland Arctic Cudweed;Gnaphalium sylvaticum L
- Omphalodes linifolia, Whiteflower Navelwort;Cynoglossum linifolium L
- Oncosiphon suffruticosum, Calomba Daisy;Tanacetum suffruticosum L;Matricaria multiflora Fenzl ex Harv;Matricaria suffruticosa L Druce;Pentzia suffruticosa L Hutch & Merxm;Shrubby Mayweed;Matricaria suffruticosa (L) Druce
- Oncostema peruviana, Portuguese Squill;Scilla peruviana;Cuban-lily;Scilla peruviana L
- Onobrychis viciifolia, Sainfoin;Hedysarum onobrychis L;Onobrychis sativa Lam
- Operculina turpethum, Convolvulus turpethum L;Ipomoea turpethum L RBr;Ipomoea anceps L Roem & Schult;Ipomaea anceps orth var Roem & Schult sensu Roemer, JJ & Schultes, JA 1819;St Thomas lidpod;Operculina triquetra
- Ophiuros exaltatus, Canegrass;Aegilops exaltata L;Rottboellia exaltata L Lf;Rottboellia corymbosa Lf;Ophiuros corymbosus Lf Gaertn;Ophiuros megaphyllus Stapf ex Haines;Rottboellia tongalingii Elmer;Ophiuros tongcalingii Elmer Henrard;Mnesithea exaltata L Skeels;Ophiuros corymbosus Lf Gaertn var corymbosus
- Oplismenus compositus, Creeping Beard Grass;Slender Panick Grass;Awned Panick Grass;Slender panick grass;Panicum compositum L;Orthopogon compositus L RBr;Running mountaingrass
- Oplismenus hirtellus, Australian Basket-grass;Panicum hirtellum L;Orthopogon aemulus RBr;Oplismenus aemulus RBr Roem & Schult;Oplismenus aemulans orth var Roem & Schult sensu Roemer, JJ & Schultes, JA 1817;Panicum aemulum RBr Steud;Oplismenus setarius var aemulus RBr FMBailey;Orthopogon imbecillis RBr;Oplismenus imbecillis RBr Roem & Schult;Panicum imbecille RBr Trin;Panicum imbicillis orth var Trin sensu Trinius CB von 1829;Oplismenus compositus var imbecillis RBr FMBailey;Oplismenus setarius var imbecillis RBr Hack;Oplismenus undulatifolius var imbecillis RBr Hack;Panicum undulatifolium var imbecille RBr Kneuck;Panicum undulatifolium var imbicillis orth var Kneuck sensu Kneucker, JA 1909;Orthopogon flaccidus RBr;Oplismenus flaccidus RBr Roem & Schult;Panicum flaccidum RBr Steud;Oplismenus aemulus var flaccidus RBr Domin;Oplismenus compositus var imbecillis FMBailey;Oplismenus aemulus var lasiorhachis Domin;Basketgrass;Oplismenus velutinus;Panicum velutinum;Panicum loliaceum;Panicum compositum
- Opuntia ficus-indica, Indian Fig;Spineless Cactus;Cactus ficus-indica L;Opuntia megacantha Salm-Dyck;Opuntia paraguayensis KSchum;Opuntia vulgaris Mill;Barbary fig;Indian fig;Tuna cactus;Opuntia compressa
- Opuntia humifusa, Creeping Pear;Opuntia compressa Salisb JFMacbr;Cactus humifusus Raf;Cactus opuntia L;Opuntia opuntia L JMCoult;Cactus compressus Salisb;Devils tongue;Devils-tongue;Devils-toungue;Low prickly pear;Prickly-pear
- Orbea variegata, Carrion Flower;Stapelia variegata L
- Orchis mascula, Early-purple Orchid;Orchis morio var mascula L
- Ornithogalum maximum, Albuca maxima Burmf;Albuca canadensis L FMLeight;Ornithogalum canadense L;Albuca major L
- Orthilia secunda, Serrated Wintergreen;Pyrola secunda L;Ramischia secunda (L) Garcke;Sidebells wintergreen
- Otanthus maritimus, Cottonweed;Filago maritima L
- Ottelia alismoides, Stratiotes alismoides L;Damasonium indicum Willd;Damasonium alismoides L RBr;Ottelia indica Willd Planch ex Dalzell & Gibson;Duck-lettuce;Ducklettuce;Duck Lettuce
- Oxalis corniculata, Oxalis;Creeping Oxalis;Yellow Wood-sorrel;Yellow Wood Sorrel;Sour-weed;Creeping Wood-sorrel;Clover Sorrel;Small-leaved Oxalis;Scour-grass;Sourgrass;Oxalis repens Thunb;Oxalis reptans Sol ex GForst;Procumbent Yellow-sorrel;Oxalis stricta sensu BL Rob et auct, non L;Xanthoxalis corniculata (L) Small;Creeping woodsorrel;Creeping Woodsorrel
- Oxalis dillenii, Sussex Yellow-sorrel;Oxalis corniculata auct, non L;Oxalis stricta auct, non L;Xanthoxalis dillenii (Jacq) Holub;Slender yellow woodsorrel;Slender Yellow Woodsorrel;Oxalis florida
- Oxalis montana, Wood-sorrel;Oxalis acetosella;Mountain Woodsorrel;Oxalis acetosella auct non L
- Oxyria digyna, Mountain Sorrel;Rumex digynus L;Alpine mountainsorrel
- Oxytropis campestris, Yellow Oxytropis;Astragalus campestris L;Oxytropis campestris subsp scotica Jalas;Field locoweed
- Ozonium aureum, Byssus aurea L
- Pachyrhizus erosus, Turnip Tree;Yam Bean;Dolichos erosus L;Yam bean;Dolichos erosus
- Paeonia mascula, Peony;Paeonia corallina Retz;Paeonia officinalis var mascula L
- Parapholis incurva, Curly Ryegrass;Coast Barb Grass;Coast Barb-grass;Coast Barbgrass;Curly Barb-grass;Curved Sea Hard-grass;Sickle Grass;Curved Hard-grass;Aegilops incurva L;Lepturus incurvus L Druce ex Briq;Lepturus incurvus L Trin;Pholiurus incurvus L Schinz & Thell;Curved sicklegrass;Sickle grass
- Parentucellia latifolia, Red Bartsia;Common Barsia;Red bartsia;Common Bartsia;Euphrasia latifolia L;Bartsia latifolia L Sm;Bartschia latifolia orth var JMBlack sensu Black, JM 1926;Broadleaf glandweed
- Parentucellia viscosa, Yellow Bartsia;Sticky Bartsia;Bartsia viscosa L;Bartschia viscosa orth var JMBlack sensu Black, JM 1926;Yellow glandweed
- Paronychia argentea, Silvery Whitlow-wort;Illecebrum paronychia L
- Parthenocissus quinquefolia, Virginia Creeper;Virginia Creeper, Five-leaved Ivy ;Hedera quinquefolia L;Virginia-creeper;Parthenocissus inserta;Virginia creeper;Ampelopsis latifolia Tausch;Ampelopsis quinquefolia (L) Michx;Parthenocissus hirsuta (Pursh) Graebn;Parthenocissus inserta (Kern) Fritsch;Psedera quinquefolia (L) Greene;Vitis inserta Kern;Vitis quinquefolia (L) Lam
- Pedilanthus tithymaloides, Euphorbia tithymaloides L;Devils-backbone;Redbird flower;Euphorbia tithymaloides
- Pelargonium alchemilloides, Geranium alchemilloides L
- Pelargonium capitatum, Rose-scented Pelargonium;Rose Pelargonium;Geranium capitatum L;Rose Geranium;Rose scented geranium
- Pelargonium peltatum, Geranium peltatum L;Ivyleaf geranium
- Pentaglottis sempervirens, Alkanet;Anchusa sempervirens L;Green Alkanet;Evergreen bugloss
- Peperomia pellucida, Piper pellucidum L;Man to man;Piper pellucidum;Man To Man
- Peristrophe bivalvis, Justicia bivalvis L
- Perotis indica, Anthoxanthum indicum L;Saccharum spicatum L;Perotis latifolia Aiton;Perotis spicata L TDurand & HDurand
- Persicaria barbata, Polygonum barbatum L
- Persicaria bistorta, Common Bistort;Bistorta major Gray;Bistorta officinalis Delarbre;Polygonum bistorta L
- Persicaria hydropiper, Water Pepper;Polygonum hydropiper L;Polygonum gracile RBr;Polygonum hydropiper var vulgare Meisn sensu Meisner, CDF 1857;Polygonum hydropiper subsp megalocarpum Danser;Polygonum hydropiper subsp microcarpum Danser;Polygonum hydropiper var lenticulare Danser;Polygonum gracile Salisb
- Persicaria lapathifolia, Pale Knotweed;Polygonum lapathifolium L;Polygonum lapathifolium L var lapathifolium;Polygonum lapathifolium L subsp lapathifolium;Polygonum lanigerum RBr;Polygonum lapathifolium var lanigerum RBr CMoore & Betche;Polygonum lapathifolium subsp lanigerum RBr Danser;Persicaria lanigera RBr Sojak;Polygonum glandulosum RBr;Polygonum nodosum Pers;Polygonum adenophorum Spreng
- Persicaria maculosa, Redshank, Jesus Plant;Redshank;Polygonum persicaria L
- Persicaria orientalis, Princes Feathers;Princess Feathers;Polygonum orientale L;Polygonum orientale var pilosum Roxb ex Meisn Meisn;Polygonum pilosum Roxb ex Meisn;Polygonum orientale var cochinchinense Lour Domin;Lagunea cochinchinense Lour;Persicaria orientale
- Petasites albus, White Butterbur;Tussilago alba L
- Petasites hybridus, Butterbur;Tussilago hybrida L;Pestilence wort
- Petrorhagia prolifera, Proliferous Pink;Dianthus prolifer L;Kohlrauschia prolifera (L) Kunth;Tunica prolifera (L) Scop;Childing pink
- Petrorhagia saxifraga, Tunicflower;Dianthus saxifragus L;Kohlrauschia saxifraga (L) Dandy;Tunica saxifraga (L) Scop;Saxifrage pink
- Petroselinum crispum, Parsley;Petroselinum sativum Hoffm;Apium crispum Mill;Apium petroselinum L;Carum petroselinum L Benth & Hookf;Garden Parsley
- Petroselinum segetum, Corn Parsley;Carum segetum (L) Benth ex Hook f;Sison segetum L
- Peucedanum ostruthium, Masterwort;Imperatoria ostruthium L
- Peucedanum palustre, Milk-parsley;Selinum palustre L;Hogfennel;Calestania palustris (L) Koso-Pol
- Phalaris aquatica, Harding Grass;Toowoomba Canary Grass;Phalaris;Toowoomba Canary-grass;Australian Phalaris;Phalaris nodosa Murray;Phalaris tuberosa L;Phalaris commutata Roem & Schult;Phalaris stenoptera Hack;Phalaris tuberosa var stenoptera Hack Hitchc;Bulbous Canary-grass;Phalaris bulbosa sensu L(1759), non L(1755)Bulbous canarygrass
- Phaleria octandra, Drimyspermum neumannii FMuell;Phaleria neumannii FMuell Benth;Phaleria blumei var latifolia Benth;Phaleria pedunculata CTWhite;Dias octandra L
- Phleum bertolonii, Smaller Cats-tail;Phleum hubbardii D Kováts;Phleum nodosum auct, non L;Phleum pratense subsp bertolonii (Dc) Bornm;Phleum pratense subsp hubbardii (D Kováts) Soó Phleum pratense subsp serotinum (Jord) Berher;Diploid Timothy
- Phleum phleoides, Purple-stem Cats-tail;Phalaris phleoides L;Boehmers Cats-tail
- Photinia pyrifolia, Red Chokeberry;Mespilus arbutifolia L;Aronia arbutifolia;Pyrus arbutifolia (L) L f;Red chokeberry
- Phragmites vallatoria, Arundo vallatoria Pluk ex L;Arundo karka Retz;Phragmites karka Retz Trin ex Steud
- Phyla nodiflora, Lippia, Carpet Weed, Frog fruit;Lippia;Carpet Weed;Carpet weed;Fogfruit;Carpet-weed;Red-flower;Fog-fruit;No Mow Grass;Fog Fruit;Phyla;Wild Lippia;Verbena nodiflora L;Blairia nodiflora L Gaertn;Zappania nodiflora L Lam;Lippia nodiflora L Michx;Frogfruit;Turkey tangle fogfruit;Phyla incisa;Phyla nodiflora var longifolia;Phyla strigulosa var sericea
- Phyllanthus acidus, Otaheite Gooseberry;Averrhoa acida L;Cicca acida L Merr;Cicca disticha L;Phyllanthus distichus L MullArg;Tahitian gooseberry tree
- Phyllodium pulchellum, Hedysarum pulchellum L;Dicerma pulchellum L Dc;Desmodium pulchellum L Benth;Meibomia pulchella L Kuntze
- Phyllodoce caerulea, Blue Heath;Andromeda caerulea L;Blue mountainheath
- Physocarpus opulifolius, Ninebark;Spiraea opulifolia L;Common ninebark
- Physospermum cornubiense, Bladderseed;Danaa cornubiensis (L) Burnat;Ligusticum cornubiense L
- Physostegia virginiana, Obedient Plant;Dracocephalum virginianum L;Obedient-plant;Obedient plant
- Phytolacca americana, Pigeon Berry;Pokeweed;Inkberry;Pigeonberry;Pokeberry;Phytolacca decandra L;American pokeweed
- Picea abies, Norway Spruce;Common Spruce;Pinus abies L;Pinus excelsa Lam;Picea excelsa Lam Link;Abies abies (L) Rusby;Abies excelsa Poir nom illegit;Picea excelsa Link nom illegit;Pinus excelsa Lam nom illegit;Pinus pyramidalis Salisb nom illegit;Norway spruce
- Picnomon acarna, Carduus acarna L;Cnicus acarna L L;Cirsium acarna L Moench;Carlina acarna L MBieb
- Pilea microphylla, Artillery Plant;Military Fern;Parietaria microphylla L;Pilea serpyllifolia Poir Wedd;Parietaria serpyllifolia Poir;Artillery-plant;Rockweed
- Pilosella officinarum, Mouse-ear-hawkweed;Hieracium pilosella L;Hieracium pilosella subsp euronotum Nägeli & Peter;Hieracium pilosella subsp melanops Peter;Hieracium pilosella subsp micradenium Nägeli & Peter;Hieracium pilosella subsp tricholepium Nägeli & Peter;Hieracium pilosella subsp trichosoma Peter;Pilosella euronota (Nägeli & Peter) Dostál;Pilosella melanops (Peter) Dostál;Pilosella officinarum subsp concinnata (F Hanb) PD Sell & C West;Pilosella officinarum subsp euronota (Nägeli & Peter) PD Sell & C West;Pilosella officinarum subsp melanops (Peter) PD Sell & C West;Pilosella officinarum subsp micradenia (Nägeli & Peter) PD Sell & C West;Pilosella officinarum subsp nigrescens (Fr) PD Sell & C West;Pilosella officinarum subsp tricholepia (Nägeli & Peter) PD Sell & C West;Pilosella officinarum subsp trichoscapa (Nägeli & Peter) PD Sell & C West;Pilosella officinarum subsp trichosoma (Peter) PD Sell & C West;Pilosella trichocarpa (Nägeli & Peter) Dostál;Pilosella tricholepia (Nägeli & Peter) Dostál
- Pimpinella major, Greater Burnet-saxifrage;Pimpinella saxifraga var major L;Hollowstem burnet saxifrage
- Piptatherum miliaceum, Many-flowered Millet-grass;Rice Millet;Many-flowered Millet Grass;Agrostis miliacea L;Oryzopsis miliacea L Benth & Hookf ex Asch & Schweinf;Stipa miliacea L Hoover;Achnatherum miliaceum L PBeauv;Milium multiflorum Cav;Piptatherum multiflorum Cav PBeauv;Smilo-grass;Oryzopsis thomasii;Oryzopsis miliacea;Smilograss;Oryzopsis miliacea (L) Benth & Hook f ex Asch & Schweinf
- Pisum sativum, Garden Pea;Pisum arvense L;Garden pea
- Pithecoctenium crucigerum, Bignonia crucigera L;Monkeys-comb;Bignonia echinatum;Bignonia crucigera;Pithecoctenium echinatum;Bignonia tiliaefolia;Bignonia echinata
- Pityrogramma calomelanos, Acrostichum calomelanos L;Gymnogramma calomelanos L Kaulf;Pteridophyta;Dixie silverback fern;Ceratopteris calomelanos;Acrostichum calomelanos
- Plantago afra, Glandular Plantain;Plantago indica auct, non L;Plantago psyllium sensu L(1762), non L(1753)
- Plantago arenaria, Plantago psyllium L;Plantago scabra Moench
- Plantago lanceolata, Ribgrass;Ribwort;Lambs Tongues;Plantain;Lambs-tongue;Lambs Tongue;Ribwort Plainain;Plaintain;Ribwort Plantain;Rib Grass;Rib-wort;Common Plaintain;Rib-grass;Plantago dubia L;Narrowleaf plantain
- Plantago psyllium, Branched Plantain;Plantago arenaria;Plantago scabra Moench nomilleg;Psyllium scabrum Holub nom illegit;Sand plantain;Sand Plantain;Plantago arenaria Waldst & Kit;Plantago indica L;Plantago scabra Moench
- Platanthera bifolia, Lesser Butterfly-orchid;Orchis bifolia L
- Platycapnos spicatus, Fumaria spicata L;Platycapnos spicata
- Plectranthus scutellarioides, Ocimum scutellarioides L;Ocymum scutellarioides orth var L sensu Linnaeus, C von 1767;Coleus scutellarioides L Benth;Solenostemon scutellarioides L Codd;Coleus atro-purpureus Benth
- Pluchea dioscoridis, Baccharis dioscoridis L
- Pluchea indica, Baccharis indica L;Indian camphorweed
- Poa pratensis, Kentucky Blue Grass;Smooth Meadow-grass;Kentucky Blue-grass;Kentucky Bluegrass;Meadow Grass;Meadow Poa;Smooth-stalked Meadow Grass;Kentucky blue grass;English meadow grass;Poa angustifolia L;Kentucky bluegrass;Pasto azul
- Polycarpaea corymbosa, Achyranthes corymbosa L;Polycarpaea diversifolia Domin;Polycarpaea indica Lam;Oldmans cap
- Polycarpon tetraphyllum, Four-Leaf Allseed;Four-leaved Allseed;Fourleaf Allseed;Allseed, Four-leaf Allseed;Four-leaved Allseed, Four-leaf Allseed;Four-leaf All-seed;Mollugo tetraphylla L;Polycarpon diphyllum Cav;Polycarpon tetraphyllum subsp diphyllum (Cav) O Bolós & Font Quer;Fourleaf manyseed;Fourleaf Manyseed
- Polygala amarella, Dwarf Milkwort;Polygala amara auct, non L;Polygala austriaca Crantz
- Polygala calcarea, Chalk Milkwort;Polygala amara sensu D Don, non L
- Polygonatum multiflorum, Solomons-seal;Convallaria multiflora L;Eurasian Solomons seal
- Polygonatum verticillatum, Whorled Solomons-seal;Convallaria verticillata L
- Polygonum glaucum, Sea Knotgrass;Polygonum maritimum;Seaside Knotweed;Polygonum maritimum auct non L
- Polypogon monspeliensis, Annual Beardgrass;Annual Beard-grass;Annual Beard Grass;Rabbit-foot Grass;Beard grass;Alopecurus monspeliensis L;Polypogon paniceus (L) Lag;Annual rabbitsfoot grass
- Polyscias fruticosa, Parsley Panax;Panax fruticosum L;Scutellaria tertia Rumph;Ming aralia
- Poncirus trifoliata, Citrus trifoliata L;Japanese Bitter-orange;Hardy orange;Trifoliate Orange
- Portulacaria afra, Crassula portulacaria L
- Potamogeton berchtoldii, Small Pondweed;Potamogeton friesii auct, non Rupr;Potamogeton pusillus auct, non L;Potamogeton trinervius sensu Dandy, pro parte, non G Fisch
- Potamogeton illinoensis, Shining Pondweed;Potamogeton lucens;Illinois pondweed;Illinois Pondweed;Potamogeton angustifolius Bercht & C Presl;Potamogeton heterophyllus Schreb;Potamogeton lucens auct non L
- Potamogeton pectinatus, Sago Pondweed;Fennel Pondweed;Stuckenia pectinata L Borner;Coleogeton pectinatus L Les & RRHaynes;Potamogeton marinus L
- Potamogeton zosteriformis, Grass-wrack Pondweed;Potamogeton compressus;Flatstem pondweed;Flatstem Pondweed;Potamogeton compressus auct non L
- Potentilla erecta, Tormentil;Tormentilla erecta L;Erect cinquefoil
- Potentilla sterilis, Barren Strawberry;Fragaria sterilis L;Strawberryleaf cinquefoil
- Potentilla vesca, Fragaria vesca L
- Pouzolzia zeylanica, Parietaria zeylanica L;Parietaria indica L;Pouzolzia indica L Wight;Urtica alienata L;Pouzolzia indica L Wight var indica;Pouzolzia indica var alienata L Wedd;Pouzolzia arnhemica FMuell;Graceful pouzolzsbush
- Premna serratifolia, Premna obtusifolia var serratifolia L Moldenke;Cornutia corymbosa Burmf;Premna integrifolia L;Premna corymbosa Burmf Merr;Premna obtusifolia RBr;Premna obtusifolia RBr var obtusifolia;Premna integrifolia var obtusifolia RBr Pei;Premna corymbosa var obtusifolia RBr HRFletcher;Premna corymbosa Burmf Rottler;Premna corymbosa Burmf Rottler var corymbosa;Premna gaudichaudii Schauer;Premna obtusifolia var gaudichaudii Schauer Moldenke;Premna nitida KSchum;Premna suavis Domin
- Primula elatior, Oxlip;Primula veris var elatior L
- Primula laurentiana, Birds-eye Primrose;Primula farinosa;Birdeye primrose;Birdeye Primrose;Primula farinosa auct non L
- Primula vulgaris, Primrose;Primula acaulis (L) Hill;Primula veris var acaulis L
- Proiphys amboinensis, Pancratium amboinense L;Eurycles amboinensis Lf Lindl;Cepa amboinensis Lf Kuntze;Pancratium australasicum Ker Gawl;Pancratium australe Spreng;Eurycles australasicus GDon;Eurycles australis Spreng Schult & Schultf;Eurycles sylvestris KDKoenig & Sims;Eurycles alata Sweet
- Prunella grandiflora, Large-flowered Selfheal;Prunella vulgaris var grandiflora L
- Prunella laciniata, Cut leaf Self-heal;Prunella vulgaris var laciniata L;Cut-leaved Selfheal;Cutleaf Selfheal
- Prunus avium, Prunus cerasus var avium L;Wild Cherry;Sweet cherry
- Prunus persica, Peach;Nectarine;Flowering Peach;Amygdalus persica L;Persica vulgaris Mill
- Pseudofumaria lutea, Yellow Corydalis;Corydalis lutea (L) Dc;Fumaria lutea L;Rock Fumewort;Corydalis lutea (L) Dc
- Pseudognaphalium luteoalbum, Jersey Cudweed;Gnaphalium luteoalbum;Gnaphalium luteoalbum L
- Pseudorchis albida, Small-white Orchid;Leucorchis albida (L) E Mey;Satyrium albidum L;Vanilla-Scented Pseudorchis
- Psilotum nudum, Skeleton Fork Fern;Skeleton Forkfern;Skeleton Fork-Fern;Skeleton Fork-fern;Psilotum triquetrum var fallacinum Domin;Bernhardia novae-hollandiae MullBerol;Lycopodium nudum L;Psilotum triquetrum Sw;Psilotum flabellatum Gand;Whisk fern;Psilotum triquetrum;Lycopodium nudum
- Psilurus incurvus, Bristle Tail Grass;Bristle-tail Grass;Nardus incurva Gouan;Nardus aristatus L;Psilurus nardoides Trin;Psilurus aristatus L Duval-Jouve;Psilurus aristatus (L) Trevis
- Psophocarpus tetragonolobus, Goa Bean;Winged Bean;Dolichos tetragonolobus L
- Pteridium aquilinum, Bracken;Pteris aquilina L;Western Brackenfern;Western brackenfern
- Puccinellia distans, Reflexed Salt-Marsh Grass;Poa distans Jacq;Poa distans L;Glyceria distans Jacq Wahlenb;Glyceria distans (Jacq) Wahlenb;Phippsia distans (Jacq) Á Löve & D Löve;Weeping alkaligrass
- Pulicaria dysenterica, Common Fleabane;Inula dysenterica L;Meadow false fleabane
- Pulsatilla vulgaris, Pasqueflower;Anemone pulsatilla L;Anemone vulgaris Mill;European Pasqueflower;Pasque flower
- Pupalia lappacea, Achyranthes lappacea L;Achyranthes atropurpurea Lam;Pupalia atropurpurea Lam Moq
- Pyrrosia lanceolata, Acrostichum lanceolatum L;Niphobolus varius Kaulf;Pyrrosia varia Kaulf Farw;Polypodium adnascens Sw;Niphobolus adnascens Sw Kaulf;Pyrrosia adnascens Sw Ching
- Pyrus pyraster, Wild Pear;Pyrus communis var pyraster L
- Ramonda myconi, Pyrenean-violet;Verbascum myconi L
- Ranunculus fluitans, River Water-crowfoot;Ranunculus aquatilis auct, non L
- Ranunculus longirostris, Fan-leaved Water-crowfoot;Ranunculus circinatus;Ranunculus aquatilis auct, non L;Longbeak buttercup;Longbeak Buttercup;Batrachium circinatum (Sibth) Rchb;Batrachium longirostre (Godr) FW Schultz;Ranunculus amphibius James;Ranunculus circinatus auct non Sibth;Ranunculus subrigidus W Drew;Ranunculus usneoides Greene
- Rapistrum perenne, Steppe Cabbage;Myagrum perenne L;Perennial bastardcabbage
- Rapistrum rugosum, Annual bastardcabbage;Giant Mustard;Turnip Weed;Turnip-weed;Wild Turnip;Allioni;Myagrum rugosum L;Bastard Cabbage
- Rauvolfia tetraphylla, Rauvolfia canescens L;Be still tree;Rauvolfia lamarckii;Rauvolfia hirsuta
- Reboulia hemisphaerica, Marchantia hemisphaerica L;Asterella hemisphaerica L PBeauv;Plagiochasma queenslandica Steph;Reboulia queenslandica Steph MLHicks;Asterella hemisphaerica var fasciata;Asterella hemisphaerica;Fimbriaria valida;Grimaldia hemisphaerica;Grimaldia ventricosa;Marchantia crinita;Marchantia fasciata;Marchantia hemisphaerica;Otiona crinita;Plagiochasma queenslandica;Plagiochasma queenslandicum;Reboulia fasciata;Reboulia queenslandica;Rhakiocarpon conspersum;Strozzius hemisphaericus
- Reichardia picroides, Scorzonera picroides L;Common brighteyes
- Reichardia tingitana, Reichardia;False Sow-thistle;False Sowthistle;Scorzonera tingitana L;Picridium tingitanum L Desf;False sowthistle
- Rhaphiolepis indica, Indian Hawthorn;India Hawthorn;Crataegus indica L
- Rhaponticum repens, Centaurea repens L;Acroptilon repens L Dc;Centaurea picris Willd;Centaurea picris Pall
- Rhinanthus angustifolius, Greater Yellow-rattle;Rhinanthus aestivalis (NW Zinger) Schischk & Serg;Rhinanthus angustifolius subsp apterus (Fr) Hyl;Rhinanthus major Ehrh non L;Rhinanthus polyclados (Chabert) AR Clapham nom inval;Rhinanthus serotinus (Schönh) Oborny
- Rhus typhina, Stags-horn Sumach;Datisca hirta L;Rhus hirta (L) Sudw;Staghorn sumac;Rhus hirta
- Rhynchosia minima, Ryncho;Rhynchosia;Rhyncho;Dolichos minimus L;Least snoutbean;Glycine reflexa;Dolichos minimus;Least Snoutbean;Dolicholus minimus (L) Medik;Dolicholus minimus (L) Medik
- Rhynchospora alba, White Beak-sedge;Schoenus albus L;White Beaksedge;White beaksedge
- Rhynchospora colorata, Starrush Whitetop;Dichromena colorata (L) Hitchc;Rhynchospora drummondiana Steud;Rhynchospora stellata (Lam) Griseb;Schoenus coloratus L
- Rhynchospora fusca, Brown Beak-sedge;Schoenus fuscus L;Brown beaksedge;Brown beak-sedge
- Ribes uva-crispa, Gooseberry;Ribes grossularia L;Grossularia uva-crispa subsp reclinata (L) Dostál;European gooseberry
- Riccardia multifida, Jungermannia multifida L;Aneura luetzelburgii;Aneura multifida var ambrosioides;Aneura multifida;Jungermannia multifida;Riccardia multifida var ambrosioides
- Ricciocarpos natans, Riccia natans L;Riccia natans
- Rivina humilis, Corral Berry;Coral Berry;Coral berry;Turkeyberry;Coralberry;Rivina glabra L;Rivina laevis L;Rougeplant
- Roemeria hybrida, Chelidonium hybridum L;Roemeria violacea Medik
- Romulea rosea, Onion-grass;Guildford Grass;Onion Grass;Onion Weed;Guilford Grass;Ixia rosea L;Oniongrass;Rosy sand-crocus;Rosy sandcrocus;Rosy Sand-Crocus
- Rorippa amphibia, Great Yellow-cress;Sisymbrium amphibium L;Great yellowcress
- Rorippa nasturtium-aquaticum, Berro Mexico;Nasturtium officinale R Br Synonym;Watercress;Water Cress;Sisymbrium nasturtiumaquaticum L;Nasturtium officinale WTAiton
- Rorippa palustris, Bog yellowcress;Marsh Watercress;Yellow Cress;Yellow Marsh-cress;Marsh Yellow-cress;Marsh Cress;Sisymbrium amphibium var palustre L;Sisymbrium palustre L Leyss;Nasturtium palustre L Dc;Nasturtium terrestre With Aiton;Sisymbrium terrestre With;Nasturtium semipinnatifidum Hook;Nasturtium terrestre var semipinnatifidum Hook Hookf;Cardamine palustris f barbareaefolia Delile Kuntze;Sisymbrium barbareaefolium Delile;Nasturtium palustre;Rorippa islandica
- Rorippa sylvestris, Sisymbrium sylvestre L;Nasturtium sylvestre L WTAiton;Creeping Yellow-cress;Creeping yellowcress
- Rosa eglanteria, Sweet-briar;Rosa rubiginosa;Sweetbriar rose;Rosa rubiginosa L
- Rosa mollis, Soft Downy-rose;Rosa pseudo-rubiginosa Lej;Rosa villosa auct, non L
- Rosa spinosissima, Burnet Rose;Rosa pimpinellifolia L;Scotch rose
- Rostraria cristata, Annual Cats Tail;Annual Cats-tail;Festuca cristata L;Lophochloa cristata L Hyl;Koeleria cristata L Bertol;Trisetaria cristata L Kerguelen;Festuca phleoides Vill;Koeleria phleoides subvar glabriflora Trautv Domin;Koeleria phleoides var glabriflora Trautv;Koeleria phleoides subvar genuina Domin;Lophochloa phleoides Vill Rchb;Koeleria phleoides Vill Pers;Koeleria phleoides var robusta Borbas;Koeleria phleoides subvar robusta Borbas Domin;Koeleria phleoides Vill Pers var phleoides;Koeleria phleoides var typica Domin;Mediterranean Hair-grass;Koeleria phleoides (Vill) Pers;Lophochloa cristata (L) Hyl;Mediterranean Hairgrass;Koeleria gerardii (Vill) Shinners;Koeleria phleoides (Vill) Pers;Lophochloa cristata (L) Hyl
- Rothia indica, Trigonella indica L;Lotus indicus Desr;Dillwynia trifoliata Roth;Rothia trifoliata Roth Pers;Glycine leptocarpa Graham;Hosackia indica Graham
- Rubus pruinosus, Rubus sublustris Lees
- Rumex bucephalophorus, Rumex aculeatus L;Bucephalophora aculeata L Pau;Horned Dock;Red Dock
- Rumex cristatus, Greek Dock;Rumex patientia auct, non L;Greek dock
- Rumex longifolius, Northern Dock;Rumex aquaticus auct, non L;Rumex domesticus Hartm;Rumex pseudonatronatus sensu Lousley, non (Borbás) Murb;Dooryard dock
- Ruppia cirrhosa, Spiral Tasselweed;Buccaferrea cirrhosa Petagna;Ruppia maritima auct, non L;Ruppia spiralis L ex Dumort;Spiral ditchgrass;Spiral Ditch-Grass;Spiral Widgeon-Grass
- Sacciolepis indica, Indian Cupscale Grass;Indian Cupscale grass;Aira spicata orth var L sensu Linnaeus, C 1753;Panicum myuros Lam;Panicum myruos orth var Lam sensu Lamarck, JBAP de Monnet de 1791;Hymenachne myuros PBeauv;Aira indica L;Panicum indicum L L;Panicum angustum Trin;Agrostis myuros PBeauv sensu Palisot de Beauvois, AMFJ 1812;Glenwoodgrass
- Sacciolepis striata, American Cupscale;Holcus striatus L;Panicum aquaticum Bosc ex Spreng, non Poir;American cupscale
- Sagina maritima, Sea Pearlwort;Sagina procumbens auct, non L
- Sagina nodosa, Knotted Pearlwort;Spergula nodosa L;Knotted pearlwort
- Sagina saginoides, Alpine Pearlwort;Spergula saginoides L;Arctic pearlwort
- Sagittaria subulata, Narrow-leaved Arrowhead;Alisma subulata L;Sagittaria pusilla Nutt;Awl-leaf arrowhead;Awl-Leafed Arrowhead;Hudson Arrowhead
- Salicornia emerici, Yellow Glasswort;Salicornia fragilis;Salicornia herbacea auct, non (L) L;Salicornia lutescens PW Ball & Tutin;Salicornia stricta auct, non Dumort
- Salicornia maritima, Common Glasswort;Salicornia europaea;Salicornia ramosissima;Slender grasswort;Slender Grasswort;Salicornia europaea auct non L;Salicornia herbacea auct non (L) L;Salicornia prostrata auct non Pall;Salicornia ramosissima auct non J Woods
- Salix repens, Creeping Willow;Salix arenaria L;Salix repens subsp argentea (Sm) EG Camus & A Camus
- Salomonia ciliata, Polygala ciliata L;Salomonia oblongifolia Dc
- Salvia verbenaca, Wild Sage;Vervain;Salvia clandestina L;Salvia horminoides Pourr;Salvia controversa Ten;Wild Clary;Salvia cleistogama de Bary & Paul;Salvia verbenacea L
- Sanguisorba minor, Salad Burnet;Sheeps Burnet;Poterium polygamum Waldst & Kit;Sanguisorba polygama Waldst & Kit FNyl;Poterium magnolii Spach;Poterium muricatum Spach;Sanguisorba muricata Spach Gremli;Poterium spachianum subsp balearicum Bourg ex Nyman;Poterium sanguisorba subsp balearicum Bourg ex Nyman Stace;Poterium sanguisorba L;Small burnet
- Sarcostemma viminale, Euphorbia viminale L;Cynanchum viminale L L
- Sauropus androgynus, Tarok manis;Keretu;Chermela hutan;Checop manis;Clutia androgyna L
- Sauropus bacciformis, Phyllanthus bacciformis L
- Saussurea alpina, Alpine Saw-wort;Serratula alpina L
- Saxifraga spathularis, St Patricks-cabbage;Saxifraga umbrosa auct, non L
- Saxifraga stolonifera, Strawberry Saxifrage;Saxifraga sarmentosa L f;Creeping Saxifrage;Saxifraga sarmentosa L;Creeping saxifrage
- Scabiosa atropurpurea, Pincushion;Purple Pincushion;Sweet Scabious;Scabiosa maritima L;Sixalix atropurpurea (L) Greuter & Burdet;Mourningbride
- Schedonorus giganteus, Giant Fescue;Bromus giganteus L;Lolium giganteum (L) Darbysh;Festuca gigantea;Festuca gigantea (L) Vill;Lolium giganteum (L) SJ Darbyshire
- Schedonorus phoenix, Tall Fescue;Festuca elatior L;Lolium arundinaceum (Schreb) Darbysh;Schedonorus arundinaceus (Schreb) Dumort;Festuca arundinacea;Tall fescue;Schedonorus arundinaceus;Festuca arundinacea Schreb;Festuca fenas Lag;Festuca uechtritziana Wiesb;Lolium arundinaceum (Schreb) SJ Darbyshire;Schedonorus arundinaceus (Schreb) Dumort, nom illeg
- Schedonorus pratensis, Meadow Fescue;Festuca elatior auct, non L;Lolium pratense (Huds) Darbysh;Festuca pratensis;Meadow fescue
- Schismus barbatus, Arabian Grass;Sheep Grass;Cushion Grass;Kelch Grass;Camel Grass;Mediterranean Grass;Festuca barbata Loefl ex L;Schismus calycinus Coss & Durieu;Schismus marginatus PBeauv;Kelch-grass;Common Mediterranean grass
- Schizaea dichotoma, Branched Comb Fern;Branched Comb-fern;Acrostichum dichotomum L;Schizaea forsteri Spreng
- Schoenoplectus lacustris, Common Club-rush;Scirpus lacustris L;Lakeshore Bulrush
- Schoenoplectus maritimus, Sea Club-rush;Bolboschoenus maritimus (L) Lye;Scirpus maritimus L;Cosmopolitan bulrush;Scirpus maritimus;Bolboschoenus maritimus
- Schoenoplectus triqueter, Triangular Club-rush;Scirpus triqueter L;Streambank Bulrush;Hymenochaeta triqueter (L) Nakai;Streambank bulrush
- Scirpoides holoschoenus, Round-headed Club-rush;Holoschoenus vulgaris Link;Scirpus holoschoenus L;Roundhead Bulrush;Holoschoenus romanus (L) Fritsch
- Sclerochloa dura, Hardgrass;Hard Meadow Grass;Hard Meadow-grass;Cynosurus durus L;Common hardgrass
- Scorpiurus muricatus, Caterpillar-plant;Scorpiurus subvillosus L;Scorpiurus sulcatus L;Prickly Scorpions-tail
- Scrophularia auriculata, Water Figwort;Scrophularia aquatica auct, non L;Shoreline Figwort
- Scrophularia umbrosa, Green Figwort;Scrophularia oblongifolia subsp umbrosa (Dumort) Gamisans;Water Figwort;Scrophularia aquatica L
- Securigera cretica, Cretan Crownvetch;Coronilla cretica L
- Securigera varia, Coronilla varia L;Purple crownvetch
- Sedum confusum, Lesser Mexican-stonecrop;Sedum hybridum sensu P Ryan et auct, non L
- Sedum forsterianum, Rock Stonecrop;Petrosedum forsterianum (Sm) Grulich;Petrosedum rupestre subsp elegans (Lej) Velayos;Sedum elegans Lej;Sedum forsterianum subsp elegans (Lej) EF Warb;Sedum rupestre auct, non L
- Sedum reflexum, Reflexed Stonecrop;Petrosedum rupestre (L) Velayos;Petrosedum rupestre subsp reflexum (L) Velayos;Sedum rupestre;Jennys stonecrop;Jennys Stonecrop;Petrosedum reflexum (L) Grulich;Sedum rupestre L
- Selaginella selaginoides, Lesser Clubmoss;Bernhardia spinosa (PBeauv) Gray nom illegit;Lycopodium selaginoides L;Selaginella spinosa P Beauv;Selaginella spinulosa A Braun
- Selinum carvifolia, Cambridge Milk-parsley;Seseli carvifolia L;Little-leaf Angelica
- Senecio doronicum, Chamois Ragwort;Solidago doronicum L
- Senecio nemorensis, Broad-leaved Ragwort;Senecio fluviatilis;Senecio sarracenicus sensu L(1754) et auct, non L(1753)
- Senna alata, Candlebush;Cassia alata L;Emperors candlesticks;Cassia alata
- Senna hirsuta, Cassia hirsuta L;Woolly senna;Cassia hirsuta
- Senna obtusifolia, Cassia obtusifolia L;Cassia tora var obtusifolia L Haines;American Sicklepod;Java-bean;Cassia tora;Cassia obtusifolia
- Senna occidentalis, Coffee Senna;Cassia occidentalis L;Cassia occidentalis L var occidentalis;Septicweed;Ditremexa occidentalis;Cassia occidentalis
- Senna sophera, Cassia sophera L;Algarrobilla
- Senna tora, Cassia tora L;Cassia tora L var tora;Sickle senna
- Seriphidium maritimum, Sea Wormwood;Artemisia gallica auct, non Willd;Artemisia maritima L;Artemisia maritima var maritima L
- Sesamum orientale, Sesamum indicum L;Sesame;Capraria integerrima;Sesamum indicum
- Sesbania grandiflora, Agati grandiflora L Desv sensu Desvaux, NA 1813;Robinia grandiflora L;Aeschynomene grandiflora L L;Vegetable hummingbird;Baby Boots
- Seseli libanotis, Moon Carrot;Athamanta libanotis L;Mooncarrot
- Sesleria caerulea, Blue Moor-grass;Cynosurus caeruleus L;Sesleria albicans Kit ex Schult;Sesleria caerulea subsp calcarea (Celak) Hegi
- Sesuvium portulacastrum, Sea Purslane;Portulaca portulacastrum L;Halimus portulacastrum L Kuntze;Shoreline seapurslane;Portulaca portulacastrum;Sesuvium acutifolium;Shoreline Seapurslane
- Setaria italica, Siberian Millet cultivar;White Manchurian Millet cultivar;German Millet;Hungarian Millet;Foxtail Millet;Italian Millet;Siberian Millet;White Manchurian Millet;Panicum;Panicum italicum L;Pennisetum italicum L RBr;Ixophorus italicus L Nash;Chaetochloa italica L Scribn;Setaria viridis subsp italica L Briq;Foxtail Bristle-grass;Foxtail bristlegrass
- Setaria verticillata, Burr Bristle Grass;Bristle Pigeon Grass;Whorled Pigeon Grass;Whorled Pigeon-grass;Whorled Pigeon grass;Whorled Pigeon-Grass;Panicum verticillatum L;Pennisetum verticillatum L RBr ex FMuell;Setaria carnei Hitchc;Panicum adhaerans Forssk;Setaria adhaerens Forsk Chiov;Rough Bristle-grass;Setaria ambigua (Guss) Guss;Setaria verticilliformis Dumort;Hooked bristlegrass
- Setaria viridis, Green Bristle Grass;Green Pigeon Grass;Green Pigeon-grass;Green Pigeon-Grass;Panicum viride L;Green Bristle-grass;Green bristlegrass;Green Foxtail;Pigeongrass;Wild Millet;Green Bristlgrass;Bottlegrass;Green Bottlegrass
- Sigesbeckia serrata, Western St Pauls-wort;Sigesbeckia cordifolia auct non Kunth;Sigesbeckia jorullensis auct non Kunth;Sigesbeckia orientalis auct, non L
- Silaum silaus, Pepper-saxifrage;Peucedanum silaus L
- Silene acaulis, Moss Campion;Cucubalus acaulis L;Moss campion
- Silene aegyptiaca, Cucubalus aegyptiacus L;Silene atocioides Boiss
- Silene coelirosa, Agrostemma coelirosa L;Lychnis coelirosa L Desr
- Silene dioica, Red Campion;Lychnis dioica L;Melandrium dioicum L Coss & Germ;Melandrium rubrum Garcke sensu Garcke, CAF 1858;Lychnis dioica var rubra Weigel;Melandrium rubrum Weigel Garcke;Lychnis diurna Sibth;Melandrium diurnum Sibth Fr;Melandrium dioicum (L) Coss & Germ;Melandrium dioicum var zetlandicum Compton;Silene dioica subsp zetlandica (Compton) AR Clapham nom inval;Red catchfly
- Silene gallica, Small-flowered Catchfly;Silene anglica L;Silene quinquevulnera L;Common catchfly
- Silene italica, Italian Catchfly;Cucubalus italicus L
- Silene otites, Spanish Catchfly;Cucubalus otites L
- Silybum marianum, Variegated Thistle;Milk Thistle;Holly Thistle;Ladys Thistle;St Marys Thistle;Bull Thistle;Spotted Milk Thistle;Spotted Thistle;Virgin Marys Thistle;Carduus marianus L;Mariana mariana L Hill;Centaurea dalmatica;Blessed milkthistle
- Simethis planifolia, Kerry Lily;Anthericum planifolium L
- Sinapis arvensis, Charlock;Wild Mustard;Brassica sinapis Vis;Brassica sinapistrum Boiss;Sinapis allionii;Brassica arvensis (L) Rabenh non L;Brassica kaber (Dc) LC Wheeler;Brassica sinapis Vis nom illegit;Charlock mustard;Field Mustard;Brassica kaber
- Sisymbrium loeselii, False London-rocket;Sisymbrium irio auct, non L;Small tumbleweed mustard
- Sisymbrium officinale, Hedgemustard;Hedge Mustard;Thalictroc;Erysimum;English Water Cress;Common Hedge Mustard;Oriental Rocket;Wild Mustard;Oriental Mustard;Tumbling Mustard;Indian Hedge Mustard;Erysimum officinale L
- Sisymbrium orientale, Wild Mustard;Hedge Mustard;Indian Hedge Mustard;Indian Hedge-mustard;Eastern Rocket;Sisymbrium columnae Jacq;Sisymbrium irio auct, non L;Indian hedgemustard
- Sisyrinchium angustifolium, Blue-eyed-grass;Sisyrinchium bermudiana;Sisyrinchium graminoides EP Bicknell;Sisyrinchium hibernicum Á Löve & D Löve;Narrowleaf blue-eyed grass;Stout blue-eyed-grass;Pointed blue-eyed-grass;Narrowleaf Blue-eyed Grass;Sisyrinchium bermudiana auct non L
- Sisyrinchium montanum, American Blue-eyed-grass;Sisyrinchium bermudiana auct, non L;Strict blue-eyed grass;Strict blue-eyed-grass;Mountain blue-eyed-grass
- Solanum americanum, Small-flowered Nightshade;Solanum linnaeanum;American black nightshade;Solanum americanum var nodiflorum;Solanum nodiflorum;Solanum oleraceum;Solanum caribaeum Dunal;Solanum fistulosum Dunal ex Poir;Solanum hermannii Dunal;Solanum linnaeanum Hepper & P-M L Jaeger;Solanum nodiflorum Jacq;Solanum sodomeum auct non L
- Solanum physalifolium, Green Nightshade;Solanum nigrum auct, non L;Solanum sarachoides;Solanum nitidibaccatum Bitter;Solanum physalifolium var nitidibaccatum (Bitter) Edmonds;Solanum sarachoides auct, non Sendtn;Hoe nightshade;Hairy nightshade;Ground-cherry nightshade;Solanum sarrachoides
- Solanum scabrum, Garden Huckleberry;Solanum melanocerasum All;Solanum nigrum var guineense L;Garden-huckleberry
- Solanum villosum, Solanum luteum Mill;Solanum nigrum var villosum L;Solanum nigrum subsp villosum L Pers;Solanum rubrum Mill;Solanum miniatum Bernh ex Willd;Solanum nigrum subsp puniceum Kirschl;Red Nightshade;Hairy nightshade;Hong guo long kui
- Solidago canadensis, Canadian Goldenrod;Solidago altissima L;Canada goldenrod
- Solidago graminifolia, Grass-leaved Goldenrod;Chrysocoma graminifolia L;Euthamia graminifolia (L) Elliott;Solidago lanceolata L
- Solidago rugosa, Rough-stemmed Goldenrod;Solidago altissima Aiton non L;Wrinkleleaf goldenrod
- Sonchus asper, Rough Sow-thistle;Prickly Sow-thistle;Rough Sowthistle;Rough Milk Thistle;Spiny Sowthistle;Prickly Sowthistle;Prickly Sow-Thistle;Sonchus oleraceus var asper L;Sonchus asper subsp glaucescens (Jord) Ball;Spiny sowthistle;Sonchus oleraceus var asper
- Sonneratia caseolaris, Sonneratia acida Lf;Rhizophora caseolaris L
- Sorbaria sorbifolia, Sorbaria;Spiraea sorbifolia L;False spiraea
- Sorbus aria, Common Whitebeam;Crataegus aria L;Pyrus aria (L) Ehrh;Chess-apple
- Sorbus decipiens, Sharp-toothed Whitebeam;Crataegus hybrida Bechst non L;Pyrus decipiens Bechst;Sorbus hybrida auct, non L
- Sorbus pseudofennica, Arran Service-tree;Sorbus fennica auct, non L
- Sorbus torminalis, Wild Service-tree;Crataegus torminalis L;Pyrus torminalis (L) Ehrh;Torminalis clusii (M Roem) KR Robertson & JB Phipps;Checkertree
- Sorghum bicolor, Grain Sorghum;Cultivated Sorghums;Cultivated Sorghum;Forage Sorghum;Broom Millet;Sweet Sorghum;Holcus bicolor L;Great Millet;Sorghum vulgare Pers;Sorghum vulgare;Holcus Andropogon
- Sorghum halepense, Johnson Grass;Johnson grass;Evergreen Millet;Aleppo Grass;Holcus halepensis L;Andropogon halepensis L Brot;Andropogon sorghum subsp halepense L Hack;Andropogon sorghum var halepense L Hack;Andropogon sorghum f muticus Hack;Andropogon miliaceus Roxb;Sorghum miliaceum Roxb Snowden;Johnson-grass;Johnsongrass;Holcus sorghum var sudanensis
- Sparaxis bulbifera, Harlequin Flower;Harlequin-flower;Ixia bulbifera L
- Spergularia marina, Salt Sand-spurrey;Lesser Sea-spurrey;Arenaria rubra var beta marina L;Arenaria marina L All;Spergularia salina JPresl & CPresl;Spergularia rupestris var elongata Fenzl;Spergularia rubra var elongata Fenzl Hookf;Spergularia rubra var beta pinguis Fenzl
- Spergularia maritima, Greater Sea-spurrey;Arenaria media L;Spergularia marginata Kitt nom illegit;Spergularia media;Media sandspurry;Spergularia marginata Dc Kittel;Spergularia media L C Presl ex Griseb
- Spergularia media, Coast Sand-spurrey;Greater Sea-spurrey;Arenaria media L;Spergularia marginata Kitt;Arenaria marginata Dc;Spergularia maritima All Chiov;Arenaria maritima All
- Spergularia rubra, Red Sand-spurrey;Sand Spurry;Sandspurry, Red Sand-spurrey;Sandspurry;Sandpurry;Sand Spurrey;Red Sandspurrey;Common Sand Spurry;Arenaria campestris L All;Arenaria rubra L;Arenaria rubra var alpha campestris L;Spergularia campestris L Asch;Red sandspurry;Sand spurrey
- Spergularia salina, Lesser Sea-spurrey;Arenaria rubra var marina L;Spergularia marina;Salt sandspurry;Salt Sandspurry;Spergularia alata Wiegand;Spergularia leiosperma (Kindb) F Schmidt;Spergularia marina (L) Griseb;Spergularia sparsiflora (Greene) A Nelson;Tissa marina (L) Britton;Tissa tenuis Greene
- Sphaerostephanos unitus, Polypodium unitum L;Cyclosorus unitus L Ching;Thelypteris unita L CVMorton
- Sphagneticola trilobata, Silphium trilobatum L;Seruneum trilobatum L Kuntze;Wedelia trilobata L Hitchc;Complaya trilobata L Strother;Thelechitonia trilobata L HRob & Cuatrec;Sphagneticola ulei OHoffm;Wedelia paludosa Dc;Bay Biscayne creeping-oxeye;Thelechitonia trilobata;Complaya trilobata;Buphthalmum strigosum;Wedelia trilobata;Wedelia paludosa;Silphium trilobatum;Acmella brasiliensis
- Spinifex littoreus, Beach Spinifex;Stipa littorea Burmf;Spinifex squarrosus L
- Spiranthes spiralis, Autumn Ladys-tresses;Ophrys spiralis L
- Spirodela polyrhiza, Large Duckweed;Lemna polyrhiza L
- Spirodela polyrrhiza, Common duckmeat;Greater Duckweed;Spirodela polyrhiza;Lemna polyrhiza L;Lemna polyrhiza;Great Duckmeal
- Sporobolus virginicus, Coastal Rat-tail Grass;Salt Couch Grass;Sand Couch;Salt-couch;Marine Couch;Salt Couch;Salt-marsh Couch-grass;Saltwater Couch;Agrostis virginica L;Vilfa virginica L PBeauv;Vilfa intermedia Trin;Vilfa matrella Nees sensu Nees von Esenbeck, CGD 1829;Sporobolus matrella Nees sensu Nees von Esenbeck, CGD 1841;Sporobolus benthamii var robustus Domin;Sporobolus benthami var robustus orth var Domin sensu Domin, K 1915;Seashore Dropseed;Seashore dropseed;Agrostis littoralis;Sporobolus littoralis
- Stachys arvensis, Stagger Weed;Hedge-nettle;Mint-weed;Field Wound Root;Field Stachys;Stagger-weed;Staggerweed;Field Woundwort;Hedge Nettle of England;Corn Wound-wort;Queensland Stagger-weed;Glechoma arvensis L;Tian ye shui su
- Stachys ocymastrum, Italian Hedgenettle;Stachys hirta L
- Stachys officinalis, Betony;Betonica officinalis L;Common hedgenettle
- Stachytarpheta jamaicensis, Light Blue Snakeweed;Jamaica Snakeweed;Verbena jamaicensis L;Zappania jamaicensis L Lam;Valerianoides jamaicense L Kuntze;Abena jamaicensis L Hitchc;Stachytarpheta indica var jamaicensis L Razi;Stachytarpheta bogoriensis Zoll & Moritzi;Stachytarpheta friedrichsthalii Hayek;Stachytarpheta marginata Vahl sensu Vahl, MH 1804;Stachytarpheta pilosiuscula Kunth;Stachytarpheta villosa Turcz;Light-blue snakeweed;Jia ma bian;Stachytarpheta jamaicensis f atrocoerulea
- Stellaria media, Chickweed;Common Chickweed;Chick Weed;Alsine media L;Alsinula media (L) Dostál nom inval;Common chickweed
- Sternbergia lutea, Winter Daffodil;Amaryllis lutea L
- Striga asiatica, Buchnera asiatica L;Asiatic Witchweed
- Stuckenia pectinata, Fennel Pondweed;Potamogeton pectinatus;Potamogeton flabellatus Bab;Sago pondweed;Sago Pondweed;Coleogeton pectinatus (L) DH Les & Haynes;Potamogeton pectinatus L;Stuckenia pectinatus (L) Berner
- Stylosanthes hamata, Caribbean Stylo;Verano;Hedysarum hamatum L;Cheesytoes;Cheesy Toes
- Suaeda maritima, Sea Blite;Chenopodium maritimum L;Annual Sea-blite;Chenopodium rostratum;Herbaceous seepweed
- Succisa pratensis, Devils-bit Scabious;Scabiosa succisa L;Devilsbit
- Symphoricarpos albus, Snowberry, Waxberry, Common Snowberry;Vaccinium album L;Symphoricarpos racemosus Michx;Symphoricarpos rivularis Suksd;Common snowberry
- Symphytum tauricum, Crimean Comfrey;Symphytum orientale Pall non L
- Synedrella nodiflora, Verbesina nodiflora L;Nodeweed;Verbesina nodiflora
- Syzygium cumini, Eugenia cumini L Druce;Eugenia jambolana Lam;Myrtus cumini L;Java plum;Myrtus cumini;Eugenia cumini
- Syzygium jambos, Eugenia jambos L;Malabar plum;Eugenia jambos;Jambosa vulgaris
- Syzygium malaccense, Eugenia malaccensis L;Myrtus malaccensis L Spreng;Jambosa malaccensis L Dc;Malaysian apple
- Tacca leontopetaloides, Tacca brownii Seem;Leontice leontopetaloides L;Tacca pinnatifida JRForst & GForst;Tacca pinnatifida subsp interrupta Warb ex Limpr;Tacca pinnatifida var brownii Seem FMBailey;Tacca pinnatifida var paeoniifolia Domin;Tacca brownii var paeoniifolia Domin Limpr;Tacca pinnatifida var permagna Domin;Batflower
- Tadehagi robustum, Tadehagi triquetrum subsp robustum Pedley Ms sensu Western Australian Herbarium 2007;Hedysarum alatum Roxb;Hedysarum triquetrum L;Desmodium triquetrum L Dc
- Taeniatherum caput-medusae, Elymus caput-medusae L;Elymus caput medus orth var L sensu Linnaeus, C 1753;Medusahead
- Tamarix aphylla, Tamarix;Athel Tree;Thuja aphylla L;Athel tamarisk
- Tanacetum balsamita, Costmary;Balsamita major Desf;Chrysanthemum balsamita (L) Baill non L
- Tanacetum corymbosum, Scentless Feverfew;Corymbflower Tansy;Chrysanthemum corymbosum L
- Tanacetum parthenium, Feverfew;Matricaria parthenium L;Pyrethrum parthenium Sm;Chrysanthemum parthenium L Bernh;Chrysanthemum parthenium L Pers;Chrysanthemum parthenium (L) Bernh;Chrysanthemum parthenium
- Tecoma stans, Tecoma;Bignonia stans L;Stenolobium stans L Seem;Yellow trumpetbush;Yellow Bells
- Teesdalia nudicaulis, Shepherds Cress;Shepards Cress;Iberis nudicaulis L;Barestem teesdalia
- Tephroseris integrifolia, Field Fleawort;Othonna integrifolia L;Senecio integrifolius (L) Clairv
- Tephroseris palustris, Marsh Fleawort;Othonna palustris L;Senecio palustris (L) Hook non Vell
- Tephrosia purpurea, Cracca purpurea L;Galega purpurea L L;Fishpoison
- Tephrosia tinctoria, Cracca tinctoria L
- Tetragonolobus maritimus, Dragons-teeth;Lotus maritimus L
- Tetragonolobus purpureus, Asparagus-pea;Winged Pea;Lotus tetragonolobus L
- Themeda arguens, Stipa arguens L;Anthistiria arguens L Willd;Anthistiria ciliata var major Thwaites;Themeda forskallii var major Thwaites Hack;Anthistiria imberbis var major Thwaites Hookf;Themeda triandra var major Thwaites Domin;Anthistiria frondosa RBr;Themeda frondosa RBr Merr
- Themeda quadrivalvis, Grader Grass;Grader grass;Andropogon quadrivalvis L;Anthistiria ciliata Lf;Themeda ciliata Lf Hack;Kangaroo grass
- Thinopyrum junceiforme, Sand Couch-Grass;Sea Couch;Sea Wheat-Grass;Sea Wheat-grass;Agropyron junceum subsp boreali-atlanticum Simonet & Guin;Elytrigia juncea subsp boreoatlantica Simonet & Guin Hyl;Elymus farctus subsp boreali-atlanticus Simonet & Guin Melderis;Elytrigia junceiformis ALove & DLove;Agropyron junceiforme ALove & DLove ALove & DLove;Sand Couch;Agropyron junceum (L) P Beauv;Elymus farctus (Viv) Runemark ex Melderis;Elytrigia farcta (Viv) Holub;Elytrigia juncea;Triticum junceum L;Russian Wheatgrass;Agropyron junceum (L) P Beauv pp;Elymus farctus (Viv) Runemark ex Melderis pp;Elymus multinodus Gould;Elytrigia juncea (L) Nevski;Thinopyrum junceum (L) A Lve pp;Triticum farctum Viv pp;Triticum junceum L pp
- Thymelaea passerina, Stellera passerina L;Stellera annua Salisb;Passerina annua Salisb Wikstr;Annual Thymelaea;Mezereon
- Todea barbara, King Fern;Austral King-fern;Acrostichum barbarum L;Todea rivularis Kunze;Todea africana Willd ex Bernh;Todea africana var litophylla FMuell;Todea antarctica var australis Andre;Osmunda barbara L Thunb;Osmunda barbara FMuell
- Tolpis barbata, Yellow Hawkweed;Crepis barbata L;Tolpis umbellata Bertol;European umbrella milkwort
- Torilis arvensis, Spreading Hedge-Parsley;Caucalis arvensis Huds;Scandix infesta L;Caucalis infesta L Curtis;Torilis infesta L Clairv;Caucalis purpurea Ten;Spreading Hedge-parsley;Spreading hedgeparsley
- Torilis nodosa, Knotted Hedge-Parsley;Knotted Parsley;Knotted Hedge-parsley ;Tordylium nodosum L;Caucalis nodosa L Scop;Knotted Hedge-parsley;Knotted hedgeparsley
- Toxicodendron radicans, Rhus radicans L;Poison ivy;Eastern poison ivy;Eastern Poison Ivy;Poison-ivy
- Toxicodendron succedaneum, Rhus Tree;Rhus succedanea L
- Trachystemon orientalis, Borago orientalis L;Abraham-Isaac-Jacob
- Tragopogon hybridus, Slender Salsify;Geropogon glaber L;Pasture Goatsbeard
- Trema orientalis, Woolly Cedar;Tree Peach;Peach Cedar;Poison Peach;Celtis orientalis L;Oriental trema
- Triadica sebifera, Chinese Tallow Tree;Croton sebifer L;Sapium sebiferum L Roxb;Chinese Tallow;North Florida Melaleuca;Chinese tallow;Sapium sebiferum;Chinese tallow tree;Triadica sebiferum
- Trianthema portulacastrum, Giant Pigweed;Black Pigweed;Trianthema monogyna L;Desert horsepurslane;Verdolaga de caballo
- Trichophorum alpinum, Cotton Deergrass;Baeothryon alpinum (L) TV Egorova;Baeothryon hudsonianum (Michx) Soják;Eriophorella alpina (L) Holub;Eriophorum alpinum L;Alpine bulrush
- Trichophorum cespitosum, Deergrass;Scirpus cespitosus L;Tufted bulrush
- Trifolium campestre, Hop Trefoil;Hop Clover;Lesser Clover;Yellow Clover;Big Hop Clover;Low Hop Clover;Large Hop Clover;Trifolium procumbens L;Field clover
- Trifolium dubium, Yellow Suckling Clover;Little Hop Clover;Small Trefoil;Lesser Clover;Least Hop Clover;Small Hop Clover;Lesser Yellow Trefoil;Yellow Suckling;Trifolium minus Sm;Lesser Trefoil;Trifolium filiforme auct, non L;Suckling clover
- Trifolium micranthum, Slender Trefoil;Trifolium filiforme L;Chrysaspis micrantha (Viv) Hendrych;Slender Hop Clover
- Trigonella glabra, Egyptian Fenugreek;Trigonella hamosa L
- Trinia glauca, Honewort;Pimpinella glauca L
- Triodanis perfoliata, Campanula perfoliata L;Specularia perfoliata L ADc;Clasping Venus looking-glass;Specularia perfoliata
- Tripleurospermum maritimum, Matricaria maritima L;Sea Mayweed;Tripleurospermum maritimum var salinum (Wallr) Kay;False mayweed
- Tripleurospermum perforatum, Scentless Mayweed;Tripleurospermum inodorum;Matricaria inodora L;Matricaria maritima subsp inodora (L) Soó Matricaria perforata Mérat;Tripleurospermum maritimum subsp inodorum (L) Hyl ex Vaar;Scentless false mayweed;Tripleurospermum perforata;Scentless False Mayweed;Chamomilla inodora (L) Gilib;Matricaria perforata Mrat;Tripleurospermum inodorum (L) Sch Bip
- Tripolium pannonicum, Sea Aster;Aster tripolium;Aster tripolium L
- Trisetum flavescens, Golden Oat Grass;Yellow Oat Grass;Avena flavescens L;Trisetum pratense Pers;Yellow Oat-grass;Yellow oatgrass
- Trisetum spicatum, Bristle Grass;Aira spicata L;Trisetum subspicatum L PBeauv f subspicatum;Spike trisetum
- Tritomaria exsecta, Diplophyllum exsectum;Jungermannia donniana Hook ex Huebener;Jungermannia exsecta;Jungermannia trilobata Steph non L;Lophozia exsecta;Scapania exsecta;Sphenolobus exsectus;Sphenolobus exsecutus
- Tritonia crocata, Blazing star;Ixia crocata L
- Turbina corymbosa, Convolvulus corymbosus L;Christmasvine
- Turgenia latifolia, Greater Bur-parsley;Tordylium latifolium L;Broadleaf false carrot
- Typhonium flagelliforme, Arum flagelliforme Lodd, GLodd & WLodd;Arum divaricatum L;Typhonium divaricatum L Decne
- Uraria lagopodioides, Hedysarum lagopodioides L;Uraria cylindracea Benth
- Urochloa distachya, Green summer grass;Panicum distachyon orth var L sensu Linnaeus, C von 1767;Panicum distachyum L;Brachiaria distachya L Stapf;Tropical signalgrass
- Urochloa ramosa, Panicum ramosum L;Brachiaria ramosa L Stapf;Dixie Signalgrass;Brachiaria ramosa (L) Stapf
- Urochloa reptans, Panicum reptans L;Brachiaria reptans L CAGardner & CEHubb;Panicum prostratum Lam;Sprawling signalgrass;Panicum reptans
- Urospermum dalechampii, Tragopogon dalechampii L
- Urospermum picroides, False Hawkbit;Tragopogon picroides L;Arnopogon picroides L Willd;Prickly goldenfleece
- Ursinia anthemoides, Ursinia;Arctotis anthemoides L
- Utricularia australis, Bladderwort;Utricularia major auct, non Schmidel;Utricularia neglecta Lehm;Utricularia vulgaris auct, non L
- Vaccaria hispanica, Cow Soapwort;Cow or Bladder Soapwort;Bladder Soapwort, Cow Soapwort;Saponaria hispanica Mill;Saponaria vaccaria L;Vaccaria pyramidata Medik;Saponaria segetalis Neck;Vaccaria segetalis Neck Garcke ex Asch;Vaccaria parviflora Moench;Cowherb;Vaccaria hispanica subsp pyramidata (Medik) Holub;Vaccaria segetalis (Neck) Garcke nom illegit;Cow soapwort
- Vachellia farnesiana, Mimosa bush;Spiky Wattle;Sweet Minosa;Mimosa Bush;Acacia pedunculata Willd;Acacia farnesiana L Willd;Mimosa farnesiana L;Acacia lenticellata FMuell;Acacia farnesiana var lenticellata FMuell FMBailey;Mimosa suaveolens Salisb;Popanax farnesiana L Raf;Farnesia odora Gasp
- Vachellia nilotica, Mimosa arabica Lam;Acacia arabica Lam Willd;Mimosa nilotica L;Acacia nilotica L Willd ex Delile
- Valerianella dentata, Narrow-fruited Cornsalad;Valeriana locusta var dentata L;Narrowfruit Cornsalad
- Valerianella discoidea, Lesser Cornsalad;Valeriana locusta var discoidea L;Valeriana discoidea L
- Valerianella locusta, Cornsalad;Valeriana locusta L;Common Cornsalad;Valerianella locusta subsp dunensis (DE Allen) PD Sell;Lewiston cornsalad;European cornsalad
- Vallaris glabra, Pergularia glabra L
- Vallisneria americana, Tapegrass;Vallisneria spiralis;American eelgrass;American Tape-Grass;American Eelgrass;Vallisneria asiatica Michx;Vallisneria neotropicalis Victorin;Vallisneria spiralis auct non L
- Verbascum creticum, Cretan Mullein;Celsia cretica L;Celsia sinuata Cav
- Veronica anagallis-aquatica, Blue Water-Speedwell;Water Speedwell;Veronica aquatica Bernh;Veronica salina Schur;Veronica catenata;Water speedwell;Veronica anagallis;Veronica anagallis L;Veronica catenata Pennell;Veronica comosa auct non K Richt;Veronica connata auct non Raf;Veronica glandifera Pennell;Veronica grandiflora auct non Gaertn;Veronica sp_x_lackschewitzii Keller;Veronica micromeria Woot & Standl;Veronica salina auct non Schur
- Vicia bithynica, Bithynian Vetch;Lathyrus bithynicus L
- Vicia ervilia, Ervil;Blister Vetch;Ervum ervilia L
- Vicia hirsuta, Hairy Vetch;Tiny Vetch;Hairy Tare;Ervum hirsutum L;Tiny vetch
- Vicia tetrasperma, Slender Vetch;Slender Tare;Four-seeded Slender Vetch;Ervum tetraspermum L;Vicia gemella Crantz;Smooth Tare;Lentil vetch
- Vigna caracalla, Phaseolus caracalla L;Snailflower
- Vigna mungo, Black Gram;Urd Bean;Phaseolus mungo L;Black gram
- Vigna radiata, Green Gram;Mung Bean;Phaseolus radiatus L;Mung-bean;Mung bean
- Vigna trilobata, Dolichos trilobatus L
- Vigna unguiculata, Cow Pea;Dolichos unguiculatus L;Dolichos unguiculata orth var ADChapm sensu Chapman, AD 1991;Blackeyed pea;Dolichos unguiculatus
- Vinca difformis, Intermediate Periwinkle;Vinca major auct, non L
- Vulpia bromoides, Silver Grass;Sild-Grass;Hair Grass;Squirrel-Tail Fescue;Squirrel-tail Fescue;Squirrel Tail Fescue;Silver Tail Fescue;Silvery Grass;Rats-tail Fescue;Brome Fescue;Silver-grass;Silk Grass;Festuca bromoides L;Festuca bromoides var tenella Hookf;Festuca sciuroides Roth;Vulpia sciuroides Roth Roth ex CCGmel;Squirreltail Fescue;Brome fescue
- Vulpia geniculata, Festuca geniculata L
- Vulpia myuros, Rats-tail Fescue;Rats Tail Fescue;Silver-grass;Fox Tail Fescue;Festuca myuros L;Vulpia megalura (Nutt) Rydb;Rat-tail fescue
- Vulpia unilateralis, Mat-grass Fescue;Nardurus maritimus (L) Murb;Triticum unilaterale L;Vulpia hispanica (Reichard) Kerguélen nom inval;Nardurus maritimus (L) Murb
- Wahlenbergia capensis, Cape Bluebell;Campanula capensis L;Wahlenbergia elongata Willd Schrad ex Roth;Campanula elongata Willd;Roella decurrens Andrews
- Wahlenbergia hederacea, Ivy-leaved Bellflower;Campanula hederacea L
- Wikstroemia indica, Tie Bush;Daphne indica L;Daphne foetida Lf;Wikstroemia shuttleworthii Meisn;Wikstroemia shuttleworthiana Meisn;Wikstroemia viridiflora Meisn;Wikstroemia foetida Lf AGray
- Withania somnifera, Winter Cherry;Physalis somnifera L
- Wolffia arrhiza, Rootless Duckweed;Lemna arrhiza L;Spotless watermeal
- Xanthium strumarium, Noogoora Burr;Xanthium orientale L;Xanthium canadense Mill;Xanthium chinense Mill;Xanthium italicum Moretti;Xanthium occidentale Bertol;Xanthium pungens Wallr;Xanthium cavanillesii Schouw;Xanthium californicum Greene;Xanthium commune Britton;Rough Cocklebur;Rough cocklebur;Rough cockleburr
- Xanthosoma sagittifolium, Coco Yam;Arum sagittifolium L;Arum sagittaefolium orth var L;Arrowleaf elephants ear;Arum xanthorrhizon;Arum sagittaefolium
- Xenostegia tridentata, Convolvulus tridentatus L;Evolvulus tridentatus L L;Ipomoea tridentata L Roth;Merremia tridentata L Hallier f;Convolvulus hastatus Desr;Merremia hastata Desr Hallier f;Merremia tridentata subsp hastata Ooststr;Ipomoea denticulata RBr;Convolvulus denticulatus RBr Spreng;Quamoclit denticulata RBr Raf;Quamoclita denticulata orth var Raf;African morningvine
- Xolantha guttata, Spotted Rock-rose;Tuberaria guttata;Cistus guttatus L;Helianthemum guttatum (L) Mill;Helianthemum guttatum subsp breweri (Planch) Syme;Therocistus guttatus (L) Holub;Tuberaria guttata subsp breweri (Planch) EF Warb;European Frostweed;Helianthemum guttatum (L) Mill;Tuberaria guttata (L) Fourr
- Youngia japonica, Prenanthes japonica L;Crepis japonica L Benth;Oriental false hawksbeard;Oriental False Hawksbeard;Crepis japonica (L) Benth;Youngia thunbergiana Dc
- Zantedeschia aethiopica, Arum Lily;Pig Lily;White Arum-lily;Calla Lily;Calla aethiopica L;Richardia africana Kunth;Altar-lily;Calla lily
- Zearaja maugeana, Maugean Skate;Raja sp L
- Zingiber officinale, Zingiber cholmondeleyi FMBailey KSchum;Amomum zingiber L;Garden ginger
- Zingiber zerumbet, Amomum zerumbet L;Bitter ginger
- Zinnia peruviana, Field Zinnia;Wild Zinnia;Chrysogonum peruvianum L;Zinnia pauciflora L;Zinnia multiflora L;Peruvian zinnia;Peruvian Zinnia;Crassina multiflora (L) Kuntze
- Ziziphus mauritiana, Indian Jujube;Chinese Apple;Chinee Apple;Rhamnus jujuba L;Ziziphus jujuba L Lam sensu Lamarck, JBAP de Monnet de & Poiret, JLM 1789;Ziziphus jujuba L Gaertn;Rhamnus mauritiana Lam Soy-Will;Ziziphus jujuba var fruticosa Haines;Ziziphus jujuba var stenocarpa Kuntze;Ziziphus aucheri Boiss;Paliurus mairei HLev;Ziziphus mairei KBrowicz & Lauener;Ziziphus poiretii GDon;Ziziphus orthacantha Dc;Ziziphus rotundata Dc;Ziziphus tomentosa Poir;Indian jujube;Zizyphus mauritiana;Ziziphus jujuba
- Ziziphus oenopolia, Rhamnus oenopolia L;Ziziphus oligantha Merr & LMPerry;Zizyphus oligantha orth var Merr & LMPerry sensu Merrill, ED & Perry, LM 1945;Ziziphus celtidifolia Dc sensu Candolle, AP de 1825;Ziziphus rufula Miq;Zizyphus rufula orth var Miq sensu Miquel, FAW 1856
- Zoysia matrella, Agrostis matrella L;Zoysia pungens Willd;Manila Grass;Manila grass
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