- Carex ablata
- Carex aboriginum
- Carex abrupta, Abruptbeak sedge
- Carex abscondita, Thicket Sedge
- Carex acutiformis, Lesser Pond-sedge
- Carex adelostoma, Circumpolar sedge
- Carex adusta, Lesser brown sedge
- Carex aestivaliformis
- Carex aestivalis, Summer sedge
- Carex aggregata, Glomerate sedge
- Carex agrostoides, Grassleaf sedge
- Carex alata, Broadwing sedge
- Carex albata
- Carex albicans, Whitetinge sedge
- Carex albida, White sedge
- Carex albolutescens, Greenwhite sedge
- Carex albonigra, Blackandwhite sedge
- Carex albula, Frosted Curls
- Carex albursina, White bear sedge
- Carex allegheniensis
- Carex alligata, Hawaii sedge
- Carex alliiformis
- Carex alma, Sturdy sedge
- Carex alopecoidea, Foxtail sedge
- Carex alopecuroides
- Carex alsophila
- Carex alterniflora
- Carex amblyorhyncha
- Carex amphibola, Eastern narrowleaf sedge
- Carex amplectens, Claspbract sedge
- Carex amplifolia, Bigleaf sedge
- Carex amplisquama
- Carex angarae
- Carex anguillata
- Carex angustata, Widefruit sedge
- Carex angustior
- Carex annectens, Yellowfruit sedge
- Carex anthoxanthea, Grassyslope arctic sedge
- Carex aperta, Columbian sedge
- Carex appalachica, Appalachian sedge
- Carex appressa, Tall Sedge
- Carex appropinquata, Fibrous Tussock-sedge
- Carex aquatilis, Water Sedge
- Carex arapahoensis, Arapaho sedge
- Carex archeri, Archers Sedge
- Carex arcta, Northern cluster sedge
- Carex arctata, Drooping woodland sedge
- Carex arctiformis, Polar sedge
- Carex arctogena
- Carex arenaria, Sand Sedge
- Carex argyrantha, Hay sedge
- Carex arisanensis
- Carex arkansana, Arkansas sedge
- Carex artitecta
- Carex assiniboinensis, Assiniboia sedge
- Carex atherodes, Wheat sedge
- Carex athrostachya, Slenderbeak sedge
- Carex atlantica, Prickly bog sedge
- Carex atrata, Black Alpine-sedge
- Carex atratiformis, Scrabrous black sedge
- Carex atrofusca, Scorched Alpine-sedge
- Carex atrosquama, Lesser blackscale sedge
- Carex atrostachya
- Carex aurea, Golden sedge
- Carex aureolensis
- Carex austrina, Southern sedge
- Carex austrocaroliniana, Tarheel Sedge
- Carex baccans
- Carex backii, Backs sedge
- Carex baileyi, Baileys sedge
- Carex baltzellii, Baltzells Sedge
- Carex barbarae, Santa Barbara sedge
- Carex barbata
- Carex barrattii, Barratts Sedge
- Carex basiantha, Willdenows Sedge
- Carex bebbii, Bebbs sedge
- Carex bella, Southwestern showy sedge
- Carex bichenoviana
- Carex bicknellii, Bicknells sedge
- Carex bicolor, Bicoloured Sedge
- Carex bigelowii, Stiff Sedge
- Carex bilateralis
- Carex biltmoreana, Stiff Sedge
- Carex binervis, Green-ribbed Sedge
- Carex blakei
- Carex blanda, Eastern woodland sedge
- Carex bolanderi, Bolanders sedge
- Carex bonanzensis, Yukon sedge
- Carex bonplandii
- Carex brachyathera
- Carex brainerdii, Brainerds sedge
- Carex brevicaulis, Shortstem sedge
- Carex breviculmis
- Carex brevicuspis
- Carex brevior, Shortbeak sedge
- Carex breviscapa
- Carex breweri, Brewers sedge
- Carex bromoides, Brome-like sedge
- Carex brownii
- Carex brunnea, Greater Brown Sedge
- Carex brunnescens, Brownish sedge
- Carex buchananii, Silver-spiked Sedge
- Carex bulbostylis, False hair sedge
- Carex bullata, Button Sedge
- Carex bushii, Bushs sedge
- Carex buxbaumii, Club Sedge
- Carex caesariensis
- Carex californica, California sedge
- Carex campylocarpa
- Carex canescens, Silvery sedge
- Carex capillacea
- Carex capillaris, Hair Sedge
- Carex capitata, Capitate sedge
- Carex careyana, Careys sedge
- Carex caroliniana, Carolina sedge
- Carex caryophyllea, Spring-sedge
- Carex castanea, Chestnut sedge
- Carex cataractae
- Carex caucasica
- Carex cephalantha
- Carex cephaloidea, Thinleaf sedge
- Carex cephalophora, Oval-leaf sedge
- Carex chapmanii, Chapmans Sedge
- Carex cherokeensis, Cherokee Sedge
- Carex chihuahuensis, Chihuahuan sedge
- Carex chlorantha
- Carex chordorrhiza, String Sedge
- Carex chrysolepis
- Carex circinata, Coiled sedge
- Carex collinsii, Collins Sedge
- Carex communis, Fibrousroot sedge
- Carex comosa, Longhair sedge
- Carex complanata, Hirsute Sedge
- Carex concinna, Low northern sedge
- Carex concinnoides, Northwestern sedge
- Carex confertospicata
- Carex congdonii, Congdons sedge
- Carex conjuncta, Soft fox sedge
- Carex conoidea, Openfield sedge
- Carex corrugata, Prune-fruit sedge
- Carex crawei, Crawes sedge
- Carex crawfordii, Crawfords Sedge
- Carex crebriflora, Coastal Plain Sedge
- Carex crinata, Fringed sedge
- Carex crinita, Fringed Sedge
- Carex cristatella, Crested sedge
- Carex cruciata
- Carex crus-corvi, Ravenfoot sedge
- Carex cryptolepis, Northeastern sedge
- Carex cryptostachys
- Carex cumberlandensis, Cumberland sedge
- Carex cumulata, Clustered sedge
- Carex curta, White Sedge
- Carex cusickii, Cusicks sedge
- Carex daibuensis
- Carex dasycarpa, Sandywoods Sedge
- Carex davalliana, Davalls Sedge
- Carex davisii, Davis sedge
- Carex davyi, Davys sedge
- Carex debilis, White edge sedge
- Carex declinata
- Carex decomposita, Cypressknee sedge
- Carex deflexa, Northern sedge
- Carex demissa
- Carex densa, Dense sedge
- Carex depauperata, Starved Wood-sedge
- Carex devia
- Carex deweyana, Dewey sedge
- Carex diandra, Lesser Tussock-sedge
- Carex digitalis, Slender woodland sedge
- Carex digitata, Fingered Sedge
- Carex dioica, Dioecious Sedge
- Carex disperma, Softleaf sedge
- Carex dissitiflora
- Carex distans, Distant Sedge
- Carex disticha, Brown Sedge
- Carex divisa, Divided Sedge
- Carex divulsa, Grassland sedge
- Carex dolichostachya, Gold fountains
- Carex doniana
- Carex donnell-smithii
- Carex douglasii, Douglas sedge
- Carex dudleyi, Dudleys sedge
- Carex duriuscula, Needleleaf sedge
- Carex ebenea, Ebony sedge
- Carex eburnea, Bristleleaf sedge
- Carex echinata, Star Sedge
- Carex edwardsiana, Edwards Plateau sedge
- Carex egglestonii, Egglestons sedge
- Carex eleusinoides, Goosegrass sedge
- Carex elliottii, Elliotts Sedge
- Carex elongata, Elongated Sedge
- Carex elynoides, Blackroot sedge
- Carex emmonsii
- Carex emoryi, Emorys sedge
- Carex enanderi
- Carex engelmannii, Engelmanns sedge
- Carex epapillosa
- Carex ericetorum, Rare Spring-sedge
- Carex exilis, Coastal sedge
- Carex exserta, Shorthair sedge
- Carex exsiccata, Western inflated sedge
- Carex extensa, Long-bracted Sedge
- Carex fascicularis, Tassel Sedge
- Carex fernaldiana
- Carex festucacea, Fescue sedge
- Carex feta, Greensheath sedge
- Carex filicina
- Carex filifolia, Threadleaf sedge
- Carex filiformis, Downy-fruited Sedge
- Carex finitima
- Carex fissa, Hammock Sedge
- Carex fissuricola, Cleft sedge
- Carex flacca, Glaucous Sedge
- Carex flaccosperma, Thinfruit sedge
- Carex flagellifera
- Carex flava, Large Yellow-sedge
- Carex flaviformis
- Carex flexuosa
- Carex floridana, Florida Sedge
- Carex folliculata, Northern long sedge
- Carex formosa, Handsome sedge
- Carex formosensis
- Carex fracta, Fragile sheath sedge
- Carex frankii, Franks sedge
- Carex franklinii
| - Carex fraseri, Fraser′ sedge
- Carex fulvor-ubescens
- Carex fulvorubescens
- Carex fuscidula
- Carex garberi, Elk sedge
- Carex gaudichaudiana
- Carex gentilis
- Carex geophila, White Mountain sedge
- Carex geyeri, Geyers sedge
- Carex gigantea, Giant sedge
- Carex glacialis, Glacial sedge
- Carex glareosa, Lesser saltmarsh sedge
- Carex glaucescens, Southern Waxy Sedge
- Carex glaucodea, Blue sedge
- Carex globosa, Roundfruit sedge
- Carex gmelinii, Gmelins sedge
- Carex godfreyi, Godfreys Sedge
- Carex goodenowii
- Carex gracilescens, Slender looseflower sedge
- Carex gracilior, Slender sedge
- Carex gracilispica
- Carex gracillima, Graceful sedge
- Carex grallatoria
- Carex granularis, Limestone meadow sedge
- Carex gravida, Heavy sedge
- Carex grayi, Grays sedge
- Carex grisea, Inflated narrow-leaf sedge
- Carex gunniana
- Carex gymnoclada
- Carex gynandra, Nodding sedge
- Carex gynocrates, Northern bog sedge
- Carex gynodynama, Olneys hairy sedge
- Carex halliana, Halls sedge
- Carex harfordii, Harfords sedge
- Carex hassei, Salt sedge
- Carex hattoriana
- Carex haydeniana, Cloud sedge
- Carex haydenii, Haydens sedge
- Carex hebes
- Carex heleonastes, Hudson Bay sedge
- Carex heliophila
- Carex helleri, Hellers sedge
- Carex hendersonii, Hendersons sedge
- Carex hepburnii
- Carex heteroneura, Different-nerve sedge
- Carex heterosperma
- Carex hindsii
- Carex hirsutella, Fuzzy wuzzy sedge
- Carex hirta, Hairy Sedge
- Carex hirtifolia, Pubescent sedge
- Carex hirtissima, Fuzzy sedge
- Carex hitchcockiana, Hitchcocks sedge
- Carex holostoma, Arctic marsh sedge
- Carex hoodii, Hoods sedge
- Carex hookerana
- Carex hoozanensis
- Carex hormathodes, Marsh straw sedge
- Carex horsfieldii
- Carex hostiana, Tawny Sedge
- Carex houghtoniana, Houghtons sedge
- Carex howei
- Carex hubbardii
- Carex humboldtiana
- Carex humilis, Dwarf Sedge
- Carex hyalina, Tissue sedge
- Carex hyalinolepis, Greater Pond-sedge
- Carex hypandra
- Carex hystericina, Bottlebrush sedge
- Carex illota, Sheep sedge
- Carex incomitata
- Carex incomperta
- Carex incurviformis, Coastal sand sedge
- Carex indica
- Carex inops, Long-stolon sedge
- Carex integra, Smoothbeak sedge
- Carex interior, Inland sedge
- Carex interrupta, Greenfruit sedge
- Carex intumescens, Greater bladder sedge
- Carex inversa, Knob Sedge
- Carex iynx
- Carex jackiana
- Carex jacobi-peteri
- Carex jamesii, James sedge
- Carex jamesonii
- Carex jonesii, Jones sedge
- Carex joorii, Cypress Swamp Sedge
- Carex josselynii
- Carex kauaiensis, Kauai sedge
- Carex kelloggii
- Carex kiotensis
- Carex klaphakei
- Carex kobomugi, Japanese sedge
- Carex kraliana
- Carex krausei, Krauses sedge
- Carex lachenalii, Hares-foot Sedge
- Carex lacistoma
- Carex lacustris, Hairy sedge
- Carex laeviconica, Smoothcone sedge
- Carex laeviculmis, Smoothstem sedge
- Carex laevigata, Smooth-stalked Sedge
- Carex laevivaginata, Smoothsheath sedge
- Carex langeana
- Carex lapponica, Lapland sedge
- Carex lasiocarpa, Slender Sedge
- Carex laxa, Weak sedge
- Carex laxiculmis, Spreading sedge
- Carex laxiflora, Broad looseflower sedge
- Carex leavenworthii, Leavenworths sedge
- Carex lemanniana
- Carex lemmonii, Lemmons sedge
- Carex lenticularis, Lakeshore sedge
- Carex lepidocarpa
- Carex leporina
- Carex leporinella, Sierra hare sedge
- Carex leptalea, Bristlystalked sedge
- Carex leptonervia, Nerveless woodland sedge
- Carex leptopoda, Taperfruit shortscale sedge
- Carex leucodonta, Huachuca Mountain sedge
- Carex ligata
- Carex ligulata
- Carex limosa, Bog-sedge
- Carex liuii
- Carex livida, Livid sedge
- Carex lobolepis
- Carex loliacea, Ryegrass sedge
- Carex lonchocarpa, Southern Long Sedge
- Carex longebrachiata, Bergalia Tussock
- Carex longii, Longs sedge
- Carex longistipes
- Carex louisianica, Louisiana sedge
- Carex lucorum, Blue Ridge sedge
- Carex lugens, Spruce muskeg sedge
- Carex lupuliformis, False hop sedge
- Carex lupulina, Hop sedge
- Carex lurida, Shallow sedge
- Carex lutulina, Hop sedge
- Carex luzulifolia, Littleleaf sedge
- Carex luzulina, Woodrush sedge
- Carex lyngbyei, Lyngbyes sedge
- Carex mackenziei, Mackenzies sedge
- Carex macloviana, Thickhead sedge
- Carex macounii
- Carex macrandrolepis
- Carex macrocephala, Largehead sedge
- Carex macrochaeta, Longawn sedge
- Carex maculata
- Carex magellanica, Tall Bog-sedge
- Carex makinoensis
- Carex manca
- Carex manhartii, Manharts Sedge
- Carex marina, Sea sedge
- Carex mariposana, Mariposa sedge
- Carex maritima, Curved Sedge
- Carex meadii, Meads sedge
- Carex media
- Carex melanocarpa
- Carex melanostachya, Great Plains sedge
- Carex membranacea, Fragile sedge
- Carex mendocinensis, Mendocino sedge
- Carex merritt-fernaldii, Fernalds sedge
- Carex mertensii, Mertens sedge
- Carex mesochorea, Midland sedge
- Carex metallica
- Carex meyenii, Meyens sedge
- Carex michauxiana, Michauxs sedge
- Carex microchaeta, Smallawned sedge
- Carex microdonta, Littletooth sedge
- Carex microglochin, Bristle Sedge
- Carex micropoda
- Carex microptera, Smallwing sedge
- Carex microrhyncha, Littlesnout sedge
- Carex misandra, Shortleaved sedge
- Carex misandroides
- Carex misera, Wretched sedge
- Carex missouriensis, Missouri sedge
- Carex mitchelliana, Mitchells Sedge
- Carex mitrata
- Carex mohriana
- Carex molesta, Troublesome sedge
- Carex montana, Soft-leaved Sedge
- Carex montis-eeka, Molokai sedge
- Carex morii
- Carex morrowii, Smooth black sedge
- Carex muehlenbergii, Muhlenbergs sedge
- Carex multicaulis, Manystem sedge
- Carex multicostata, Manyrib sedge
- Carex muricata, Rough sedge
- Carex muriculata, Schiedes sedge
- Carex muskingumensis, Muskingum sedge
- Carex nardina, Spike sedge
- Carex nebrascensis, Nebraska sedge
- Carex nelsonii, Nelsons sedge
- Carex nemostachys
- Carex nervina, Sierra sedge
- Carex nesophila
- Carex neurochlaena
- Carex neurophora, Alpine nerve sedge
- Carex nigra, Common Sedge
- Carex nigricans, Black alpine sedge
- Carex nigromarginata, Black Edge Sedge
- Carex normalis, Greater straw sedge
- Carex norvegica, Close-headed Alpine-sedge
- Carex nova, Black sedge
- Carex novae-angliae, New England sedge
- Carex nubigena
- Carex nudata, Naked sedge
- Carex obispoensis, San Luis Obispo sedge
- Carex oblita
- Carex obnupta, Slough sedge
- Carex obtusata, Obtuse sedge
- Carex occidentalis, Western sedge
- Carex oederi
- Carex oklahomensis, Oklahoma sedge
- Carex oligocarpa, Richwoods sedge
- Carex oligosperma, Fewseed sedge
- Carex olneyi
- Carex oreocharis, Grassyslope sedge
- Carex ormantha
- Carex ormostachya, Necklace spike sedge
- Carex ornithopoda, Birds-foot Sedge
- Carex oronensis, Orono sedge
- Carex orthostemon
- Carex otrubae, False Fox-sedge
- Carex ovalis, Oval Sedge
- Carex oxyandra
- Carex oxylepis, Sharpscale Sedge
| - Carex pachystachya, Chamisso sedge
- Carex paleacea, Chaffy sedge
- Carex pallescens, Pale Sedge
- Carex panicea, Carnation Sedge
- Carex paniculata, Greater Tussock-sedge
- Carex pansa, Sanddune sedge
- Carex parallela, Parallel sedge
- Carex parryana, Parrys sedge
- Carex paucicostata
- Carex pauciflora, Few-flowered Sedge
- Carex paupercula
- Carex paysonis, Paysons sedge
- Carex peckii, Pecks sedge
- Carex pedunculata, Longstalk sedge
- Carex pellita, Woolly sedge
- Carex pendula, Pendulous Sedge
- Carex pennsylvanica, Pennsylvania sedge
- Carex pensylvanica, Pennsylvania sedge
- Carex perakensis
- Carex perglobosa, Globe sedge
- Carex petasata, Liddon sedge
- Carex petricosa, Rockdwelling sedge
- Carex phacota
- Carex phaeocephala, Dunhead sedge
- Carex phaeopoda
- Carex phyllomanica
- Carex physorhyncha, Stellate sedge
- Carex picta, Bootts sedge
- Carex pigra, Tarheel Sedge
- Carex pilulifera, Pill Sedge
- Carex piperi, Pipers sedge
- Carex plana
- Carex planispicata, Flat-spiked sedge
- Carex planostachys, Cedar sedge
- Carex plantaginea, Plantainleaf sedge
- Carex platylepis, Broadscale sedge
- Carex platyphylla, Broadleaf sedge
- Carex pluriflora, Manyflower sedge
- Carex podocarpa, Shortstalk sedge
- Carex polymorpha, Variable sedge
- Carex polystachya, Caribbean sedge
- Carex polysticha
- Carex praeceptorum, Early sedge
- Carex praegracilis, Clustered field sedge
- Carex prairea, Prairie sedge
- Carex prasina, Drooping sedge
- Carex praticola, Meadow sedge
- Carex preslii, Presls sedge
- Carex prionophylla
- Carex projecta, Necklace sedge
- Carex proposita, Great Smoky Mountain sedge
- Carex pseudocyperus, Cyperus Sedge
- Carex pseudohelvola
- Carex pseudoscirpoidea
- Carex pulicaris, Flea Sedge
- Carex pumila, Dwarf sedge
- Carex punctata, Dotted Sedge
- Carex purdiei
- Carex purpureotincta
- Carex purpurifera, Purple sedge
- Carex pygmaea
- Carex pyrenaica, Pyrenean sedge
- Carex radfordii, Radfords Sedge
- Carex radiata, Eastern star sedge
- Carex rafflesiana
- Carex ramenskii, Ramensks sedge
- Carex rariflora, Mountain Bog-sedge
- Carex raymondii, Raymonds sedge
- Carex raynoldsii, Raynolds sedge
- Carex recta, Estuarine Sedge
- Carex remota, Remote Sedge
- Carex reniformis, Kidneyshape Sedge
- Carex retroflexa, Reflexed sedge
- Carex retrorsa, Knotsheath sedge
- Carex rhynchachaenium
- Carex richardsonii, Richardsons sedge
- Carex roanensis, Roan Mountain Sedge
- Carex rochebruni
- Carex roraimensis
- Carex rosea, Rosy sedge
- Carex rossii, Ross sedge
- Carex rostrata, Bottle Sedge
- Carex rotundata, Round sedge
- Carex rufina, Snowbed sedge
- Carex rugosperma
- Carex rupestris, Rock Sedge
- Carex ruthii, Ruths sedge
- Carex sabulosa, Baikal sedge
- Carex sachalinensis
- Carex salina, Saltmarsh Sedge
- Carex saliniformis, Santa Cruz sedge
- Carex sartwelliana, Yosemite sedge
- Carex sartwellii, Sartwells sedge
- Carex satzumensis
- Carex saxatilis, Russet Sedge
- Carex saximontana, Rocky Mountain sedge
- Carex scabrata, Eastern rough sedge
- Carex scabrifolia
- Carex scabriuscula, Siskiyou sedge
- Carex schottii, Schotts sedge
- Carex schweinitzii, Schweinitzs sedge
- Carex scirpiformis
- Carex scirpoidea, Northern singlespike sedge
- Carex sclerocarpa
- Carex scoparia, Broom sedge
- Carex scopulorum, Mountain sedge
- Carex secta
- Carex senta, Swamp carex
- Carex seorsa, Weak stellate sedge
- Carex serratodens, Twotooth sedge
- Carex sheldonii, Sheldons sedge
- Carex shortiana, Shorts sedge
- Carex siccata, Dryspike sedge
- Carex silicea, Beach sedge
- Carex simulata, Analogue sedge
- Carex sitchensis
- Carex socialis, Low woodland sedge
- Carex sociata
- Carex solandri
- Carex sparganioides, Bur-reed sedge
- Carex specifica, Narrowfruit sedge
- Carex spectabilis, Showy sedge
- Carex specuicola, Navajo sedge
- Carex spicata, Spiked Sedge
- Carex spissa, San Diego sedge
- Carex sprengelii, Sprengels sedge
- Carex squarrosa, Squarrose sedge
- Carex standleyana
- Carex stans
- Carex stellata
- Carex stenochlaena
- Carex stenoptila, Riverbank sedge
- Carex sterilis, Dioecious sedge
- Carex stipata, Awlfruit sedge
- Carex straminea, Eastern straw sedge
- Carex straminiformis, Shasta sedge
- Carex striata, Walters Sedge
- Carex striatula, Lined sedge
- Carex stricta, Tufted-sedge
- Carex strigosa, Thin-spiked Wood-sedge
- Carex styloflexa, Bent sedge
- Carex stylosa, Variegated sedge
- Carex subbracteata, Smallbract sedge
- Carex suberecta, Prairie straw sedge
- Carex subfilicinoides
- Carex subfusca, Brown sedge
- Carex subimpressa
- Carex subnigricans, Nearlyblack sedge
- Carex subspathacea, Hoppners sedge
- Carex subviridula
- Carex sullivantii
- Carex superata, Willdenows Sedge
- Carex supina, Weak arctic sedge
- Carex svenonis
- Carex swanii, Swans sedge
- Carex sychnocephala, Manyhead sedge
- Carex sylvatica, Wood-sedge
- Carex tahoensis, Tahoe sedge
- Carex taihokuensis
- Carex taiwanensis
- Carex tasmanica
- Carex tatsatakensis
- Carex tenax, Wire Sedge
- Carex tenera, Quill sedge
- Carex teneriformis, Sierra slender sedge
- Carex tenuiflora, Sparseflower sedge
- Carex tenuispica
- Carex tereticaulis
- Carex terrae-novae
- Carex tetanica, Rigid sedge
- Carex texensis, Texas sedge
- Carex thunbergii, Maui sedge
- Carex thurberi, Thurbers sedge
- Carex timida
- Carex tincta, Tinged sedge
- Carex tompkinsii, Thompkins sedge
- Carex tonsa, Shaved sedge
- Carex torreyi, Torreys sedge
- Carex torta, Twisted sedge
- Carex transalpine
- Carex triangularis, Eastern Fox Sedge
- Carex tribuloides, Blunt broom sedge
- Carex trichocarpa, Hairyfruit sedge
- Carex trifida, Mutton bird sedge
- Carex trinervis, Three-nerved Sedge
- Carex tripartita
- Carex triquetra, Triangularfruit sedge
- Carex trisperma, Threeseeded sedge
- Carex tristachya
- Carex tuckermanii, Tuckermans sedge
- Carex tumulicola, Splitawn sedge
- Carex turgescens, Pine Barren Sedge
- Carex typhina, Cattail sedge
- Carex uberior
- Carex umbellata, Parasol sedge
- Carex unilateralis, Lateral sedge
- Carex urelytra
- Carex ursina, Bear sedge
- Carex utriculata, Northwest Territory sedge
- Carex vaginata, Sheathed Sedge
- Carex validior
- Carex vallicola, Valley sedge
- Carex varia
- Carex venusta, Darkgreen sedge
- Carex vernacula, Native sedge
- Carex verrucosa, Warty Sedge
- Carex vesicaria, Bladder-sedge
- Carex vestita, Velvet sedge
- Carex vexans, Florida hammock sedge
- Carex vicaria, Western fox sedge
- Carex virens
- Carex virescens, Ribbed sedge
- Carex viridior
- Carex viridula, Little green sedge
- Carex vulpina, True Fox-sedge
- Carex vulpinoidea, American Fox-sedge
- Carex wahuensis, Oahu sedge
- Carex walteriana
- Carex whitneyi, Whitneys sedge
- Carex wiegandii, Wiegands sedge
- Carex willdenowii, Willdenows sedge
- Carex williamsii, Williams sedge
- Carex woodii, Pretty sedge
- Carex wootonii, Wootons sedge
- Carex xerantica, Whitescale sedge
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