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Allium cepa L.
ONION
Garden onion; Cultivated Onion

Life   Plantae   Monocotyledoneae   Liliaceae   Allium

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Allium cepa, seed
© Copyright Seeds USID 2015 · 1
Allium cepa, seed

Associates · map
FamilyScientific name @ source (records)
Andrenidae  Andrena prunorum @ BBSL (3)
Aphalaridae  Aphalara calthae @ CSCA_TCN (1)
Aphididae  Myzus ( @ CSCA_TCN (9)

Neotoxoptera formosana @ CSCA_TCN (11); NCSU (18)

Neotoxoptera violae @ NCSU (11)

Rhopalosiphum rufiabdominale @ CSCA_TCN (1)
Apidae  Bombus centralis @ BBSL (2)

Bombus citrinus @ CUIC_ENT (1)

Bombus griseocollis @ CUIC_ENT (1)

Bombus morrisoni @ BBSL (2)

Bombus nevadensis @ BBSL (1)
Botryosphaeriaceae  Diplodia gossypina @ BPI (1)

Diplodia natalensis @ BPI (3)

Phyllosticta allii @ BPI (1)

Phyllosticta @ BPI (1)
Chaetosphaerellaceae  Cladotrichum sparsa @ BPI (1)
Colletidae  Colletes fulgidus @ BBSL (2)

Colletes phaceliae @ BBSL (1)
Davidiellaceae  Cladosporium herbarum @ BPI (1)

Cladosporium sparsum @ BPI (1)

Cladosporium @ BPI (1)
Fomitopsidaceae  Sporotrichum flavissimum @ BPI (1)
Glomerellaceae  Colletotrichum circinans @ 397236B (1); 397236C (1); 397228B (1); 397236A (1); 397228A (1); BPI (5)

Colletotrichum dematium @ BPI (2)

Colletotrichum gloeosporioides @ BPI (1)
Halictidae  Agapostemon virescens @ CUIC_ENT (2)

Halictus farinosus @ BBSL (3)

Halictus ligatus @ BBSL (1)

Halictus tripartitus @ BBSL (1)

Lasioglossum cinctipes @ CUIC_ENT (1)

Lasioglossum quebecense @ CUIC_ENT (3)

Lasioglossum truncatum @ CUIC_ENT (1)

Lasioglossum zonulum @ CUIC_ENT (1)

Sphecodes minor @ CUIC_ENT (2)
Margarodidae  Heteromargarodes americanus @ CSCA_TCN (4)
Megachilidae  Coelioxys rufitarsis @ BBSL (1)

Osmia rufa @ BBSL (1)
Mycosphaerellaceae  Cercospora duddiae @ 436012A (1); 436012B (1); BPI (2)

Heterosporium allii-cepae @ BPI (1)

Heterosporium allii @ 442932B (1); 442932A (1); BPI (3)

Mycosphaerella allicina @ BPI (2)

Mycosphaerella schoenoprasi @ BPI (4)
Nectriaceae  Fusarium malli @ BPI (1)

Fusarium oxysporum @ BPI (1)

Fusarium solani @ BPI (1)

Fusarium @ 451433B (1); 451433A (1)
Peronosporaceae  Peronospora destructor @ BPI (9)

Peronospora schleideni @ BPI (43)
Pleomassariaceae  Helminthosporium @ BPI (1)
Pleosporaceae  Alternaria allii @ BPI (2)

Alternaria circinans @ BPI (1)

Alternaria iranica @ BPI (1)

Alternaria palandui @ BPI (1)

Alternaria porri @ 446490A (1); 446493A (1); BPI (9); 446493B (1); 446490B (1)

Alternaria tenuis @ BPI (1)

Alternaria vanuatuensis @ BPI (1)

Alternaria @ BPI (1)

Curvularia lunata @ 443692B (1); 443692A (1); 443691B (1); 443691A (1)

Curvularia @ BPI (1)

Drechslera spicifera @ BPI (1)

Macrosporium alliorum @ BPI (1)

Macrosporium parasiticum @ 445391A (1); BPI (3); 445395A (1); 445391B (1); 445395B (1); 445393A (1); 445393B (1)

Macrosporium porri @ BPI (9)

Macrosporium sarcinula @ BPI (1)

Macrosporium @ BPI (2)

Pleospora allii @ BPI (11)

Pleospora herbarum @ BPI (9)

Pleospora socialis @ BPI (1)

Stemphylium botryosum @ BPI (4)

Stemphylium lycopersici @ 444832B (1); 444832A (1)

Stemphylium parasiticum @ BPI (5); 444633A (1); 444633B (1); 444639B (1); 444639A (1)

Stemphylium sarcinula @ BPI (1)
Pucciniaceae  Puccinia allii @ BPI (4)

Puccinia asparagi @ BPI (7)

Puccinia porri @ BPI (9)
Sclerotiniaceae  Botrytis allii @ BPI (17)

Botrytis byssoidea @ BPI (4)

Botrytis cinerea @ BPI (2)

Botrytis fulva @ BPI (1)

Botrytis squamosa @ BPI (5)

Botrytis vulgaris @ BPI (1)

Botrytis @ BPI (5)

Sclerotinia sclerotiorum @ BPI (1)
Trichocomaceae  Aspergillus niger @ BPI (5)

Aspergillus phoenicis @ BPI (1)
Turritellidae  Vermicularia circinans @ BPI (17)

Vermicularia dematium @ BPI (2)
Typhulaceae  Sclerotium cepae @ BPI (1)

Sclerotium cepivorum @ 456467B (1); BPI (11); 456480A (1); 456467A (1); 456480B (1)

Sclerotium rolfsii @ BPI (1)

Sclerotium @ BPI (1)
Urocystaceae  Urocystis cepulae @ BPI (86)
Uropyxidaceae  Aecidium @ BPI (1)
Ustilaginaceae  Ustilago allii @ BPI (3)
_  Papulaspora coprophila @ BPI (1)

Papulaspora dodgei @ BPI (1)

Papulaspora @ 410081B (1); 410081A (1)

Piricauda paraguayensis @ BPI (1)

Pyrenochaeta terrestris @ BPI (2)

Sterigmatocystis nigra @ BPI (5)

Sterigmatocystis phaeocephala @ BPI (1)

Tuburcinia cepulae @ BPI (1)

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Following modified from MissouriPlants.com
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Allium cepa  L. - Onion

Allium cepa plant

Family - Liliaceae

Stems - No info. yet.

Leaves - No info. yet.

Inflorescence - No info. yet.

Allium cepa bract

Flowers - No info. yet.

Allium cepa flowers

Flowering - May - July.

Habitat - Cultivated and uncommonly escaped to waste ground. Also persistent around old homesites.

Origin - Native to southwestern Asia.

Other info. - This is the common "Onion" of culinary fame. This species can be found growing wild in just a handful of Missouri counties but it is cultivated nearly throughout the state. There are many different varieties grown around the world for food and for ornament. Some varieties produce showy flowers, some produce tasty, large bulbs and few to no flowers.
As most of us know by now, cutting an onion can make your eyes tear. The chemical responsible for this is syn-propanethial-S-oxide. To read more about the chemistry of onions, check out this link .

Photographs taken in the Ozark Scenic Riverways, Shannon County, MO., 6-24-03.


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Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=ALCE ---> https://plants.usda.gov/java/profile?symbol=ALCE
&pull 20q v4.662 20091102: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://plants.usda.gov/java/profile?symbol=ALCE

Following modified from Flora of North America
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Link to Flora of North America home
 
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FNA Vol. 26 Page 225, 228, 244 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 26 | Liliaceae | Allium

22. Allium cepa Linnaeus, Sp. Pl. 1: 301. 1753.

Cultivated onion

Bulbs 1—3, not rhizomatous, mostly depressed-globose, varying in size from cultivar to cultivar, 5—8 × 3—10 cm; outer coats enclosing 1 or more bulbs, yellowish brown, red, or white, membranous, without reticulation; inner coats white to pink, cells obscure to quadrate. Leaves persistent, 4—10, sheathing proximal 1/6—1/4 scape; blade fistulose, usually ± semicircular in cross section, 10—50 cm × 4—20 mm. Scape persistent, solitary, erect, fistulose, inflated below middle, 30—100 cm × 3—20 mm. Umbel persistent, erect, compact, to 500-flowered, globose, bulbils occasionally found; spathe bracts caducous, 2—3, 3—4-veined, ovate, ± equal, apex acute to acuminate. Flowers stellate to campanulate to urceolate, 3—7 mm; tepals erect to ± spreading, white to pink with greenish midveins, withering in fruit, margins entire, apex obtuse or acute, outer ovate, inner oblong; stamens exserted; anthers white; pollen white; ovary crestless; style linear, ± equaling stamens; stigma capitate, unlobed; pedicel 10—50 mm. Seed coat not known.

Flowering Jun--Aug. Disturbed sites adjacent to areas where cultivated; 0--500 m; Ark., Calif., Kans., La., Mont., Oreg., Tex., Wash.; cultivated in Europe, Asia.

The onion of commerce, Allium cepa is widely cultivated as a biennial in North America, Europe, and Asia. It is unknown in the wild and is probably derived from A. oschanini of central Asia. The cultivated form is often polyploid (2n = 16, 32, 54) and possibly of hybrid origin. It exists in numerous cultivars, a few of which form large bulbils in the umbel.

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Allium+cepa&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Allium+cepa&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
&pull 20q v4.662 20091102: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Allium+cepa&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

Updated: 2017-12-11 06:44:35 gmt
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