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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 @ NCSU (18); CSCA_TCN (11)

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 @ 397236C (1); 397228B (1); 397236A (1); 397236B (1); BPI (5); 397228A (1)

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 @ 442932A (1); 442932B (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 @ 446490B (1); 446493A (1); 446493B (1); BPI (9); 446490A (1)

Alternaria tenuis @ BPI (1)

Alternaria vanuatuensis @ BPI (1)

Alternaria @ BPI (1)

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

Curvularia @ BPI (1)

Drechslera spicifera @ BPI (1)

Macrosporium alliorum @ BPI (1)

Macrosporium parasiticum @ 445393B (1); 445391A (1); 445395B (1); 445393A (1); 445395A (1); BPI (3); 445391B (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 @ 444832A (1); 444832B (1)

Stemphylium parasiticum @ 444633B (1); 444639B (1); 444633A (1); BPI (5); 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); 456480B (1); 456480A (1); BPI (11); 456467A (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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Following modified from Flora of North America
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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.

Updated: 2024-06-15 04:33:40 gmt
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