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Allium cepa L.
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)
Colletidae  Colletes fulgidus @ BBSL (2)

Colletes phaceliae @ BBSL (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)

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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.


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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CalPhotos     Photo Database


Number of matches : 6
Query: SELECT * FROM img WHERE ready=1 and taxon like "Allium cepa%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Allium cepa
Allium cepa
Garden Onion
ID: 0000 0000 1005 1011 [detail]
© 2005 Luigi Rignanese

Allium cepa
Allium cepa
Garden Onion
ID: 0000 0000 1005 1013 [detail]
© 2005 Luigi Rignanese

Allium cepa
Allium cepa
ID: 0000 0000 1105 0352 [detail]
© 2005 Luigi Rignanese

Allium cepa
Allium cepa
ID: 0000 0000 1105 0355 [detail]
© 2005 Luigi Rignanese

Allium cepa
Allium cepa
ID: 0000 0000 0816 1090 [detail]
© 2016 Zoya Akulova

Allium cepa
Allium cepa
ID: 0000 0000 0816 1092 [detail]
© 2016 Zoya Akulova

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   

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Updated: 2017-08-17 14:38:32 gmt
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