| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ALCEC | Allium cepa L. var. cepa | garden onion | Liliaceae
|
| ALCEM | Allium cepa L. var. multiplicans Bailey | Allium cepa var. cepa | Liliaceae
|
| ALCEP | Allium cepa L. var. proliferum (Moench) Regel | Allium cepa var. cepa | Liliaceae
|
| ALCES | Allium cepa L. var. solaninum Alef. | Allium cepa var. cepa | Liliaceae
|
| ALCEV | Allium cepa L. var. viviparum M.C. Metz | garden onion | Liliaceae
|
| ALCE | Allium cepa L. | garden onion | Liliaceae
|
| ALCEC2 | Allium cernuum Roth var. cernuum | nodding onion | Liliaceae
|
| ALCEN | Allium cernuum Roth var. neomexicanum (Rydb.) J.F. Macbr. | New Mexican nodding onion | Liliaceae
|
| ALCEO | Allium cernuum Roth var. obtusum Cockerell ex J.F. Macbr. | nodding onion | Liliaceae
|
| ALCE2 | Allium cernuum Roth | nodding onion | Liliaceae
|
| ALCH5 | Allium chinense G. Don | rakkyo | Liliaceae
|
| ALCO6 | Allium collinum Dougl. ex S. Wats. | Allium fibrillum | Liliaceae
|
| ALCO2 | Allium columbianum (Ownbey & Mingrone) P. Peterson, Annable & Rieseberg | Columbian onion | Liliaceae
|
| ALCO3 | Allium constrictum (Ownbey & Mingrone) P. Peterson, Annable & Rieseberg | Grand Coulee onion | Liliaceae
|
| ALCO4 | Allium continuum Small | Allium canadense var. canadense | Liliaceae
|
| ALCO | Allium coryi M.E. Jones | yellowflower onion | Liliaceae
|
| ALCR3 | Allium cratericola Eastw. | Cascade onion | Liliaceae
|
| ALCR4 | Allium crenulatum Wieg. | Olympic onion | Liliaceae
|
| ALCR5 | Allium crispum Greene | crinkled onion | Liliaceae
|
| ALCR13 | Allium cristatum S. Wats. | Allium atrorubens var. cristatum | Liliaceae
|
| ALCR10 | Allium croceum Torr. | Bloomeria crocea var. crocea | Liliaceae
|
| ALCU3 | Allium cusickii S. Wats. | Allium tolmiei var. tolmiei | Liliaceae
|
| ALCU | Allium cuthbertii Small | striped garlic | Liliaceae
|
| ALDA | Allium davisiae M.E. Jones | Allium lacunosum var. davisiae | Liliaceae
|
| ALDE6 | Allium denticulatum (Ownbey & Aase) McNeal | toothed onion | Liliaceae
|
| ALDI10 | Allium diabolense (Ownbey & Aase) McNeal | serpentine onion | Liliaceae
|
| ALDI2 | Allium dichlamydeum Greene | coastal onion | Liliaceae
|
| ALDI3 | Allium dictuon St. John | Blue Mountain onion | Liliaceae
|
| ALDI5 | Allium dictyotum Greene | Allium geyeri var. geyeri | Liliaceae
|
| ALDI8 | Allium diehlii (M.E. Jones) M.E. Jones | Allium brandegeei | Liliaceae
|
| ALDOC | Allium douglasii Hook. var. columbianum Ownbey & Mingrone | Allium columbianum | Liliaceae
|
| ALDOC2 | Allium douglasii Hook. var. constrictum Ownbey & Mingrone | Allium constrictum | Liliaceae
|
| ALDON | Allium douglasii Hook. var. nevii (S. Wats.) Ownbey & Mingrone | Allium nevii | Liliaceae
|
| ALDO | Allium douglasii Hook. | Douglas' onion | Liliaceae
|
| ALDR | Allium drummondii Regel | Drummond's onion | Liliaceae
|
| ALEL | Allium elmendorfii M.E. Jones ex Ownbey | Elmendorf's onion | Liliaceae
|
| ALEQ | Allium equicaeleste St. John | Allium macrum | Liliaceae
|
| ALFAD | Allium falcifolium Hook. & Arn. var. demissum Jepson | Allium siskiyouense | Liliaceae
|
| ALFA3 | Allium falcifolium Hook. & Arn. | scytheleaf onion | Liliaceae
|
| ALFI | Allium fibrillum M.E. Jones | Cuddy Mountain onion | Liliaceae
|
| ALFI6 | Allium fibrosum Rydb., non Regel | Allium geyeri var. tenerum | Liliaceae
|
| ALFIM3 | Allium fimbriatum S. Wats. ssp. mohavense (Tidestrom) Traub & Ownbey | Allium fimbriatum var. mohavense | Liliaceae
|
| ALFIP3 | Allium fimbriatum S. Wats. ssp. parryi (S. Wats.) Traub & Ownbey | Allium parryi | Liliaceae
|
| ALFIP4 | Allium fimbriatum S. Wats. ssp. purdyi (Eastw.) Traub & Ownbey | Allium fimbriatum var. purdyi | Liliaceae
|
| ALFIA | Allium fimbriatum S. Wats. var. abramsii Ownbey & Aase | Allium abramsii | Liliaceae
|
| ALFID | Allium fimbriatum S. Wats. var. denticulatum Ownbey & Aase | Allium denticulatum | Liliaceae
|
| ALFID2 | Allium fimbriatum S. Wats. var. diabolense Ownbey & Aase | Allium diabolense | Liliaceae
|
| ALFIF | Allium fimbriatum S. Wats. var. fimbriatum | fringed onion | Liliaceae
|
| ALFIM | Allium fimbriatum S. Wats. var. mohavense (Tidestrom) Jepson | Mojave fringed onion | Liliaceae
|
| ALFIM2 | Allium fimbriatum S. Wats. var. munzii Ownbey & Aase | Allium munzii | Liliaceae
|
| ALFIP | Allium fimbriatum S. Wats. var. parryi (S. Wats.) Ownbey & Aase | Allium parryi | Liliaceae
|
| ALFIP2 | Allium fimbriatum S. Wats. var. purdyi (Eastw.) Ownbey & Aase | Purdy's fringed onion | Liliaceae
|
| ALFIS | Allium fimbriatum S. Wats. var. sharsmithiae Ownbey & Aase | Allium sharsmithiae | Liliaceae
|
| ALFI2 | Allium fimbriatum S. Wats. | fringed onion | Liliaceae
|
| ALFI4 | Allium fistulosum L. | welsh onion | Liliaceae
|
| ALFR2 | Allium fragile A. Nels. | Allium scilloides | Liliaceae
|
| ALFR4 | Allium fragrans auct. non Vent. | Nothoscordum borbonicum | Liliaceae
|
| ALFR | Allium fraseri (Ownbey) Shinners | Allium canadense var. fraseri | Liliaceae
|
| ALGET2 | Allium geyeri S. Wats. ssp. tenerum (M.E. Jones) Traub & Ownbey | Allium geyeri var. tenerum | Liliaceae
|
| ALGEC | Allium geyeri S. Wats. var. chatterleyi Welsh | Geyer's onion | Liliaceae
|
| ALGEG | Allium geyeri S. Wats. var. geyeri | Geyer's onion | Liliaceae
|
| ALGEG3 | Allium geyeri S. Wats. var. graniferum Henderson | Allium geyeri var. tenerum | Liliaceae
|
| ALGET | Allium geyeri S. Wats. var. tenerum M.E. Jones | bulbil onion | Liliaceae
|
| ALGET3 | Allium geyeri S. Wats. var. textile (A. Nels. & J.F. Macbr.) Boivin | Allium textile | Liliaceae
|
| ALGE | Allium geyeri S. Wats. | Geyer's onion | Liliaceae
|
| ALGL | Allium glandulosum Link & Otto | gland onion | Liliaceae
|
| ALGO | Allium gooddingii Ownbey | Goodding's onion | Liliaceae
|
| ALHA | Allium haematochiton S. Wats. | redskin onion | Liliaceae
|
| ALHE2 | Allium helleri Small | Allium drummondii | Liliaceae
|
| ALHI | Allium hickmanii Eastw. | Hickman's onion | Liliaceae
|
| ALHO | Allium hoffmanii Ownbey | beegum onion | Liliaceae
|
| ALHOS2 | Allium howellii Eastw. ssp. sanbenitense (Traub) Traub & Ownbey | Allium howellii var. sanbenitense | Liliaceae
|
| ALHOC | Allium howellii Eastw. var. clokeyi Ownbey & Aase | Clokey's onion | Liliaceae
|
| ALHOH | Allium howellii Eastw. var. howellii | Howell's onion | Liliaceae
|
| ALHOS | Allium howellii Eastw. var. sanbenitense (Traub) Ownbey & Aase | San Benito onion | Liliaceae
|
| ALHO2 | Allium howellii Eastw. | Howell's onion | Liliaceae
|
| ALHY3 | Allium hyacinthoides Bush | Allium canadense var. hyacinthoides | Liliaceae
|
| ALHY | Allium hyalinum Curran | glassy onion | Liliaceae
|
| ALIN5 | Allium incisum A. Nels. & J.F. Macbr. | Allium lemmonii | Liliaceae
|
| ALIN7 | Allium inodorum Ait. | Allium neapolitanum | Liliaceae
|
| ALIN11 | Allium inodorum auct. non Ait. | Nothoscordum borbonicum | Liliaceae
|
| ALIN6 | Allium intactum Jepson | Allium sanbornii var. congdonii | Liliaceae
|
| ALIN4 | Allium inyonis M.E. Jones | Allium atrorubens var. cristatum | Liliaceae
|
| ALJE | Allium jepsonii (Ownbey & Aase) S. Denison & McNeal | Jepson's onion | Liliaceae
|
| ALJO | Allium johnstonii M.E. Jones ex Jepson | Allium burlewii | Liliaceae
|
| ALKU | Allium kunthii G. Don | Kunth's onion | Liliaceae
|
| ALLAD | Allium lacunosum S. Wats. var. davisiae (M.E. Jones) McNeal & Ownbey | pitted onion | Liliaceae
|
| ALLAK | Allium lacunosum S. Wats. var. kernense McNeal & Ownbey | Kern's pitted onion | Liliaceae
|
| ALLAL | Allium lacunosum S. Wats. var. lacunosum | pitted onion | Liliaceae
|
| ALLAM2 | Allium lacunosum S. Wats. var. micranthum Eastw. | pitted onion | Liliaceae
|
| ALLA3 | Allium lacunosum S. Wats. | pitted onion | Liliaceae
|
| ALLAF2 | Allium lavandulare Bates ssp. fraseri (Ownbey) Traub & Owenbey | Allium canadense var. fraseri | Liliaceae
|
| ALLAF | Allium lavandulare Bates var. fraseri (Ownbey) Shinners | Allium canadense var. fraseri | Liliaceae
|
| ALLA8 | Allium lavandulare Bates | Allium canadense var. lavandulare | Liliaceae
|
| ALLE3 | Allium lemmonii S. Wats. | Lemmon's onion | Liliaceae
|
| ALMA4 | Allium macropetalum Rydb. | largeflower onion | Liliaceae
|
| ALMA5 | Allium macrum S. Wats. | rock onion | Liliaceae
|
| ALMA6 | Allium madidum S. Wats. | swamp onion | Liliaceae
|
| ALMA19 | Allium marvinii A. Davids. | Allium haematochiton | Liliaceae
|
| ALME | Allium membranaceum Ownbey | papery onion | Liliaceae
|
| ALMI6 | Allium microscordion Small | Allium canadense var. mobilense | Liliaceae
|