Complete list of species
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| scientific name | common name(s) | image gallery |
| Alchemilla glomerulans | Clustered Lady's Mantle | |
| Alchemilla wichurae | Grassland Lady's Mantle | |
| Aldama cordifolia | Heartleaf Goldeneye Mountain Goldeneye | |
| Alectryon macrococcus | Alaalahua Hawaii Alectryon Hawaii-plum Mahoe | |
| Alectryon macrococcus var. auwahiensis | Alaalahua Hawaii Alectryon Mahoe | |
| Alectryon macrococcus var. macrococcus | Alaalahua Hawaii Alectryon Mahoe | |
| Aletes acaulis | Stemless Indian Parsley Stemless Indian-parsley Indian Parsley Mountain Caraway | |
| Aletes anisatus | Rocky Mountain Indian Parsley Anise Springparsley | |
| Aletes filifolius | Trans-Pecos Indian Parsley | |
| Aletes humilis | Colorado Aletes | |
| Aletes macdougalii | Macdougal's Indian Parsley Macdougal's Indian-parsley | |
| Aletes macdougalii ssp. breviradiatus | Macdougal's Indian Parsley Macdougal's Indian-parsley San Juan False Carrot | |
| Aletes macdougalii ssp. macdougalii | Macdougal's Indian Parsley Macdougal's Indian-parsley | |
| Aletes sessiliflorus | Sessileflower Indian Parsley Sessileflower Indian-parsley Sessileflower Springparsley Sessile-flower Aletes | |
| Aletris aurea | Golden Colicroot Colicroot Star Grass Yellow Colic Root | |
| Aletris bracteata | Bracted Colicroot Bracted Unicorn Root Bahamian Unicorn Root White Colicroot | |
| Aletris farinosa | White Colicroot Colic Root Unicorn Root | |
| Aletris lutea | Yellow Colicroot Yellow Colic-root | |
| Aletris obovata | Southern Colicroot Blunt-leaved Colic Root | |
| Aletris ×tottenii | Colicroot | |
| Aliciella caespitosa | Rabbit Valley Gilia Wonderland Alice-flower Rabbit Valley Cheat Gily-flower | |
| Aliciella formosa | Aztec Gilia Beautiful Gilia Aztec Cheat Gily-flower | |
| Aliciella haydenii | San Juan Gilia Hayden's Gilia | |
| Aliciella heterostyla | Cactus Flat Gilia Cactus Flat Gily-flower Cactus Flat Cheat Gily-flower | |
| Aliciella hutchinsifolia | Desert Pale Gilia Desert Pale Gily-flower Desert Pale Cheat Gily-flower Hutchin's Gilia | |
| Aliciella latifolia | Broad-leaf Gilia Broadleaf Gilia Broad Leaf Gilia Broad-leaved Gilia Broad-leaf Gily-flower Broad-leaf Cheat Gily-flower | |
| Aliciella latifolia ssp. imperialis | Broadleaf Gilia Broad-leaf Gilia Broad Leaf Gilia Broad-leaved Gilia Broad-Leaf Gily-flower Broad-Leaf Cheat Gily-flower | |
| Aliciella latifolia ssp. latifolia | Broadleaf Gilia Broad-leaf Gilia Broad Leaf Gilia Broad-leaved Gilia Broad-Leaf Gily-flower Broad-Leaf Cheat Gily-flower | |
| Aliciella leptomeria | Sand Gilia Great Basin Gilia Sand Gily-flower Sand Cheat Gily-flower Slender Gilia | |
| Aliciella lottiae | Lott's Gilia Lott's Gily-flower Lott's Cheat Gily-flower | |
| Aliciella mcvickerae | Mcvicker's Gilia Mcvicker's Gily-flower Mcvicker's Cheat Gily-flower | |
| Aliciella micromeria | Dainty Gilia Dainty Gily-flower Dainty Cheat Gily-flower Spreading Sand Gilia | |
| Aliciella nyensis | Nye Gilia Nye Gily-flower Nye Cheat Gily-flower | |
| Aliciella penstemonoides | Black Canyon Gilia Black Canyon Gily-flower Black Canyon Cheat Gily-flower | |
| Aliciella pinnatifida | Sticky Gilia | |
| Aliciella ripleyi | Ripley's Gilia Ripley's Gily-flower Ripley's Cheat Gily-flower Ripley's Aliciella | |
| Aliciella sedifolia | Stonecrop Gilia Stonecrop Gily-flower Stonecrop Cheat Gily-flower | |
| Aliciella stenothyrsa | Uinta Basin Gilia Unita Basin Gily-flower Unita Cheat Gily-flower | |
| Aliciella subacaulis | Pinyon Gilia Pinyon Gily-flower Pinyon Cheat Gily-flower | |
| Aliciella subnuda | Coral Gilia | |
| Aliciella tenuis | Mussentuchit Creek Gilia Mussentuchit Creek Gily-flower Mussentuchit Creek Cheat Gily-flower | |
| Aliciella triodon | Coyote Gilia Coyote Gily-flower Coyote Cheat Gily-flower | |
| Alisma gramineum | Narrowleaf Water Plantain Grass Leaf Water Plantain Grasslike Waterplantain Geyer Waterplantain Lanceleaf Water Plantain | |
| Alisma subcordatum | American Water Plantain | |
| Alisma triviale | Northern Water Plantain | |
| Allenrolfea occidentalis | Iodinebush Pickleweed | |
| Allionia choisyi | Smooth Trailing Four O'Clock Trailing Four O'Clock Annual Windmills Umbrellawort Garapatilla | |
| Allionia incarnata | Trailing Windmills Trailing Four O'Clock Pink Windmills Trailing Allionia | |
| Allionia incarnata var. incarnata | Trailing Windmills Trailing Four O'Clock Pink Windmills Trailing Allionia Pink Three-flower Umbrella-wort | |
| Allionia incarnata var. nudata | Trailing Windmills | |
| Allionia incarnata var. villosa | Trailing Windmills | |
| Allium aaseae | South Idaho Onion | |
| Allium abramsii | Abrams' Allium Abrams' Onion | |
| Allium acuminatum | Tapertip Onion | |
| Allium allegheniense | Allegheny Onion | |
| Allium amplectens | Narrowleaf Onion | |
| Allium anceps | Twin Leaved Onion Twinleaf Onion | |
| Allium atrorubens | Dark Red Onion Darkred Onion | |
| Allium atrorubens var. atrorubens | Dark Red Onion Darkred Onion | |
| Allium atrorubens var. cristatum | Dark Red Onion Darkred Onion | |
| Allium bigelovii | Bigelow's Onion New Mexico Wild Leek | |
| Allium bisceptrum | Twincrest Onion | |
| Allium bisceptrum var. bisceptrum | Twincrest Onion | |
| Allium bisceptrum var. palmeri | Aspen Onion | |
| Allium bolanderi | Bolander's Onion | |
| Allium bolanderi var. bolanderi | Bolander's Onion | |
| Allium bolanderi var. mirabile | Bolander's Onion | |
| Allium bolanderi var. stenanthum | Bolander's Onion | |
| Allium brandegeei | Brandegee's Onion | |
| Allium brevistylum | Shortstyle Onion | |
| Allium burdickii | Narrowleaf Wild Leek | |
| Allium burlewii | Burlew's Onion | |
| Allium campanulatum | Dusky Onion | |
| Allium canadense | Meadow Garlic Wild Garlic Wild Onion | |
| Allium canadense var. canadense | Meadow Garlic Wild Onion Canada Onion | |
| Allium canadense var. ecristatum | Meadow Garlic Wild Onion | |
| Allium canadense var. fraseri | Fraser Meadow Garlic Fraser Meadow Garlic Wild Onion | |
| Allium canadense var. hyacinthoides | Hyacinth Meadow Garlic Wild Onion | |
| Allium canadense var. lavandulare | Meadow Garlic Wild Onion | |
| Allium canadense var. mobilense | Meadow Garlic Wild Onion | |
| Allium cernuum | Nodding Onion | |
| Allium cernuum var. cernuum | Nodding Onion | |
| Allium cernuum var. neomexicanum | New Mexican Nodding Onion | |
| Allium cernuum var. obtusum | Nodding Onion | |
| Allium columbianum | Columbian Onion | |
| Allium constrictum | Grand Coulee Onion | |
| Allium coryi | Yellowflower Onion Yellow-flowered Onion | |
| Allium cratericola | Cascade Onion | |
| Allium crenulatum | Olympic Onion | |
| Allium crispum | Crinkled Onion | |
| Allium cuthbertii | Striped Garlic | |
| Allium denticulatum | Toothed Onion Toothed Wild Onion | |
| Allium diabolense | Diablo Onion Serpentine Onion | |
| Allium dichlamydeum | Coastal Onion | |
| Allium dictuon | Blue Mountain Onion | |
| Allium douglasii | Douglas' Onion | |
| Allium drummondii | Drummond's Onion Wild Garlic Drummond Wild Onion | |
| Allium elmendorfii | Elmendorf's Onion | |
| Allium falcifolium | Scytheleaf Onion Scythe-leaf Onion Sickle-leaf Onion | |
| Allium fibrillum | Cuddy Mountain Onion | |
| scientific name | common name(s) | image gallery |
