This list is based on the USDAs accepted classification.[1]
| Common name | Scientific name | Image | Notes | | Abrams' onion | Allium abramsii
(Ownbey & Aase) McNeal | |
| Allegheny onion | Allium allegheniense
Small | |
| Aspen onion | Allium bisceptrum
S. Watson var. palmeri (S. Watson) Cronquist |
| Autumn onion | Allium stellatum
Fraser ex Ker Gawl. |
| Bear garlic, Ramsons, Wild Garlic | Allium ursinum
L. |
| Beegum onion | Allium hoffmanii
Ownbey | |
| Bigelow's onion | Allium bigelovii
S. Watson | |
| Black garlic | Allium nigrum
L. |
| Blue Mountain onion | Allium dictuon
H. St. John | |
| Bolander's onion | Allium bolanderi
S. Watson and vars. bolanderi, mirabile, stenanthum | |
| Brandegee's onion | Allium brandegeei
S. Watson |
| Broadleaf wild leek | Allium ampeloprasum
L. |
| Broadleaf wild leek | Allium atroviolaceum
Boiss. | |
| Broadstemmed onion | Allium platycaule
S. Watson |
| Bulbil onion | Allium geyeri
S. Watson var. tenerum M.E. Jones |
| Burlew's onion | Allium burlewii
Davidson | |
| Cascade onion | Allium cratericola
Eastw. |
| Chinese chives | Allium odorum
L. | |
| Chinese chives | Allium tuberosum
Rottler ex Spreng. |
| Clokey's onion | Allium howellii
Eastw. var. clokeyi Ownbey & Aase | |
| Coastal onion | Allium dichlamydeum
Greene |
| Columbian onion | Allium columbianum
(Ownbey & Mingrone) P. Peterson, Annable & Rieseberg |
| Compact onion | Allium vineale
L. ssp. compactum (Thuill.) Coss. & Germ. |
| Congdon's onion | Allium sanbornii
Alph. Wood var. congdonii Jeps. |
| Crinkled onion | Allium crispum
Greene |
| Cuddy Mountain onion | Allium fibrillum
M.E. Jones |
| Cultivated garlic | Allium sativum
L. |
| Darkred onion | Allium atrorubens
S. Watson and vars. atrorubens, cristatum | |
| Dotted onion | Allium punctum
L.F. Hend. | |
| Douglas' onion | Allium douglasii
Hook. | |
| Drummond's onion | Allium drummondii
Regel |
| Dusky onion | Allium campanulatum
S. Watson |
| Early onion | Allium praecox
Brandegee |
| Egyptian onion | Allium proliferum
(hybrid of A. cepa and A. fistulosum) |
| Elmendorf's onion | Allium elmendorfii
M.E. Jones ex Ownbey | |
| Field garlic | Allium oleraceum
L. |
| Fragile onion | Allium scilloides
Douglas ex S. Watson | |
| Fraser meadow garlic | Allium canadense
L. var. fraseri Ownbey |
| Fringed onion | Allium fimbriatum
S. Watson and var. fimbriatum |
| Garden leek | Allium porrum
L. |
| Garden onion | Allium cepa
L.{{collapsible list | title = Synonyms | Allium cepa var. aggregatum G. Don | Allium cepa var. anglicum Alef. | Allium cepa var. argenteum Alef. | Allium cepa var. bifolium Alef. | Allium cepa var. bulbiferum Regel | Allium cepa var. crinides Alef. | Allium cepa var. flandricum Alef. | Allium cepa var. globosum Alef. | Allium cepa var. hispanicum Alef. | Allium cepa var. jamesii Alef. | Allium cepa var. lisboanum Alef. | Allium cepa var. luteum Alef. | Allium cepa var. multiplicans L.H. Bailey | Allium cepa var. portanum Alef. | Allium cepa var. praecox Alef. | Allium cepa var. proliferum (Moench) Regel | Allium cepa var. rosum Alef. | Allium cepa var. sanguineum Alef. | Allium cepa var. solaninum Alef | Allium cepa var. sylvestre Regel | Allium cepa var. tripolitanum Alef. | Allium cepa var. viviparum (Metz) Mansf. | Allium cepaeum St.-Lag. | Allium commune Noronha | Allium cumaria Buch.-Ham. ex Wall. | Allium esculentum Salisb. | Allium napus Pall. ex Kunth | Allium nigritanum A.Chev. [Invalid] | Allium pauciflorum Willd. ex Ledeb. | Allium salota Dostál | Ascalonicum sativum P.Renault | Cepa alba P.Renault | Cepa esculenta Gray | Cepa pallens P.Renault | Cepa rubra P.Renault | Cepa vulgaris (L.) Garsault [invalid] | Kepa esculenta (L.) Raf. | Porrum cepa (L.) Rchb. | [2][3][4]} |
| Geyer's onion | Allium geyeri
S. Watson and vars. chatterleyi, geyeri |
| Gland onion | Allium glandulosum
Link & Otto | |
| Glassy onion | Allium hyalinum
Curran |
| Goodding's onion | Allium gooddingii
Ownbey | |
| Grand Coulee onion | Allium constrictum
(Ownbey & Mingrone) P. Peterson, Annable & Rieseberg | |
| Hickman's onion | Allium hickmanii
Eastw. | |
| Howell's onion | Allium howellii
Eastw. and var. howellii | |
| Hyacinth meadow garlic | Allium canadense
L. var. hyacinthoides (Bush) Ownbey & Aase |
| Jepson's onion | Allium jepsonii
(Ownbey & Aase) S. Denison & McNeal |
| Jeweled onion | Allium serra
McNeal & Ownbey |
| Kern's pitted onion | Allium lacunosum
S. Watson var. kernense McNeal & Ownbey |
| Kunth's onion | Allium kunthii
G. Don | |
| Largeflower onion | Allium macropetalum
Rydb. | |
| Lemmon's onion | Allium lemmonii
S. Watson | |
| Lillydale onion | Allium oxyphilum
Wherry | |
| Little River Canyon onion | Allium speculae
Ownbey & Aase |
| Manyflower onion | Allium pleianthum
S. Watson |
| Meadow garlic | Allium canadense
L. and vars. canadense, ecristatum, lavandulare, mobilense | |
| Mediterranean onion | Allium paniculatum
L. |
| Mexicali onion | Allium peninsulare
Lemmon ex Greene |
| Mojave fringed onion | Allium fimbriatum
S. Watson var. mohavense (Tidestr.) Jeps. |
| Munz's onion | Allium munzii
(Ownbey ex Traub) McNeal |
| Narrowleaf onion | Allium amplectens
Hook. |
| Narrowleaf wild leek | Allium burdickii
(Hanes) A.G. Jones | |
| Nevada onion | Allium nevadense
S. Watson |
| Nevius' garlic | Allium nevii
S. Watson | |
| New Mexican nodding onion | Allium cernuum
Roth var. neomexicanum (Rydb.) J.F. Macbr. |
| Nodding onion | Allium cernuum
Roth and vars. cernuum, obtusum |
| Olympic onion | Allium crenulatum
Wiegand |
| One-leaf onion | Allium unifolium
Kellogg |
| Pacific onion | Allium validum
S. Watson |
| Papery onion | Allium membranaceum
Ownbey | |
| Parish's onion | Allium parishii
S. Watson |
| Parry's fringed onion | Allium parryi
S. Watson | |
| Passey's onion | Allium passeyi
N.H. Holmgren & A.H. Holmgren | |
| Peninsula onion | Allium peninsulare
Lemmon ex Greene var. peninsulare | Many references give the common name "Penisula Onion", this may be a perpetuated typo, but EOL[5] uses "Peninsula onion" |
| Pitted onion | Allium lacunosum
S. Watson and vars. davisiae, lacunosum, lacunosum, micranthum |
| Plains onion | Allium perdulce
S.V. Fraser and var.perdulce | |
| Purdy's fringed onion | Allium fimbriatum
S. Watson var. purdyi (Eastw.) Ownbey & Aase | |
| Rakkyo | Allium chinense
G. Don |
| Ramp | Allium tricoccum
Aiton |
| Rawhide Hill onion | Allium tuolumnense
(Ownbey & Aase) S. Denison & McNeal |
| Red Sierra onion | Allium obtusum
Lemmon and vars. conspicuum, obtusum |
| Redskin onion | Allium haematochiton
S. Watson |
| Robinson's onion | Allium robinsonii
L.F. Hend. |
| Rock onion | Allium macrum
S. Watson |
| Runyon's onion | Allium runyonii
Ownbey | |
| San Benito onion | Allium howellii
Eastw. var. sanbenitense (Traub) Ownbey & Aase | |
| San Bernardino Mountain onion | Allium monticola
Davidson | |
| San Francisco onion | Allium peninsulare
Lemmon ex Greene var. franciscanum McNeal & Ownbey |
| Sanborn's onion | Allium sanbornii
Alph. Wood and var. sanbornii |
| Sand leek | Allium scorodoprasum
L. and ssp. rotundum |
| Scytheleaf onion | Allium falcifolium
Hook. & Arn. |
| Serpentine onion | Allium diabolense
(Ownbey & Aase) McNeal | |
| Sevendevils onion | Allium tolmiei
(Hook.) Baker ex S. Watson var. persimile Ownbey | |
| Sharsmith's onion | Allium sharsmithiae
(Ownbey & Aase) McNeal | |
| Shortstyle onion | Allium brevistylum
S. Watson | |
| Simil onion | Allium simillimum
L.F. Hend. | |
| Siskiyou onion | Allium siskiyouense
Ownbey |
| Small onion | Allium parvum
Kellogg |
| South Idaho onion | Allium aaseae
Ownbey | |
| Spanish Needle onion | Allium shevockii
McNeal |
| Sperry's onion | Allium perdulce
S.V. Fraser var. sperryi Ownbey | |
| Striped garlic | Allium cuthbertii
Small | |
| Swamp onion | Allium madidum
S. Watson | |
| Tanners Canyon onion | Allium plummerae
S. Watson | |
| Tapertip onion | Allium acuminatum
Hook. |
| Textile onion | Allium textile
A. Nelson & J.F. Macbr. |
| Threebract onion | Allium tribracteatum
Torr. | |
| Threecorner leek | Allium triquetrum
L. |
| Tolmie's onion | Allium tolmiei
(Hook.) Baker ex S. Watson and var. tolmiei | |
| Toothed onion | Allium denticulatum
(Ownbey & Aase) McNeal |
| Triploid onion | Allium cornutum | |
| Twincrest onion | Allium bisceptrum
S. Watson and var. bisceptrum |
| Twinleaf onion | Allium anceps
Kellogg |
| Victory onion | Allium victorialis
L. |
| Wakegi onion | Allium wakegi
(hybrid between A. cepa and A. fistulosum) | |
| Wallowa onion | Allium tolmiei
(Hook.) Baker ex S. Watson var. platyphyllum (Tidestr.) Ownbey | |
| Welsh onion | Allium fistulosum
L. |
| White garlic | Allium neapolitanum
Cirillo |
| Wild chives | Allium schoenoprasum
L. and vars. schoenoprasum, sibiricum |
| Wild garlic | Allium vineale
L. and ssp. vineale |
| Wild onion | Allium ascalonicum
L. |
| Yellowflower onion | Allium coryi
M.E. Jones | |
| Yosemite onion | Allium yosemitense
Eastw. |
1. ^{{cite web |url=https://plants.usda.gov/java/ClassificationServlet?source=profile&symbol=ALLIU&display=63|title=Classification USDA PLANTS|date=2014-03-15}}
2. ^{{cite web|url=http://www.theplantlist.org/tpl/record/kew-295261|title=The Plant List, Allium cepa|publisher=|accessdate=17 October 2018}}
3. ^{{cite web |url=http://plants.usda.gov/java/profile?symbol=alce |title=Allium cepa: Garden onion |year=2013 |work= The PLANTS Database |publisher=USDA: NRCS |accessdate=2013-03-31}}
4. ^{{cite web |url=https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=42720 |title=Allium cepa L. |date=2013-03-08 |publisher=ITIS |accessdate=2013-04-01}}
5. ^{{cite web|url=http://eol.org/pages/1084811/names/common_names|title=Mexicali Onion - Allium peninsulare - Common names - Encyclopedia of Life|website=Encyclopedia of Life|accessdate=17 October 2018}}
{{Allium}}{{DEFAULTSORT:Onion cultivars}}