Allium canadense, the Canada onion, Canadian garlic, wild garlic, meadow garlic and wild onion is a perennial plant native to eastern North America from Texas to Florida to New Brunswick to Montana. The species is also cultivated in other regions as an ornamental and as a garden culinary herb. The plant is also reportedly naturalized in Cuba.
Allium validum is a species of flowering plant commonly called swamp onion, wild onion, Pacific onion, or Pacific mountain onion. It is native to the Cascade Range, to the Sierra Nevada, the Rocky Mountains, and other high-elevation regions in California, Oregon, Washington, Nevada, Idaho and British Columbia. It is a perennial herb and grows in swampy meadows at medium and high elevations.
Allium nigrum, common name black garlic, broad-leaved leek, or broadleaf garlic, is a Middle Eastern species of wild onion. It lacks the onion or garlic scent shared by most of the other species in the group. The species is native to Turkey, Cyprus, Syria, Lebanon, and Israel but cultivated as an ornamental in many other places. It has become naturalized in some regions, including parts of the United States.
Allium unifolium, the one-leaf onion or American garlic, is a North American species of wild onion. It is native to the coastal mountain ranges of California, Oregon, and Baja California. It grows on clay soils including serpentine, at elevations up to 1100 m.
Allium acuminatum, also known as the tapertip onion or Hooker's onion, is a species in the genus Allium native to North America.
Allium peninsulare is a North American species of wild onion. It is known by such common names as Mexicali onion and Peninsula onion; the former referring to the Mexican city just south of the US/Mexican border, the latter referring to the Peninsula of Baja California. It is widespread in California, USA, where it grows in the California Coast Ranges, Sierra Nevada foothills, some of the Channel Islands, and Peninsular Ranges. The range extends south into the northernmost part of Baja California and north into southern Oregon.
Allium sanbornii is a North American species of wild onion known by the common name Sanborn's onion. It is native to northern California and southwestern Oregon. It grows in the serpentine soils of the southern Cascade Range and northern Sierra Nevada foothills.
Allium dictuon is a species of wild onion known by the common name Blue Mountain onion. It is native to a small section of the Blue Mountains straddling the border between southeastern Washington and northeastern Oregon in the United States. It grows in Columbia, Garfield and Walla Walla Counties in Washington, plus Umatilla and Wallowa Counties in Oregon.
Allium aaseae, the Southern Idaho onion or Aase's onion, is a plant species endemic to southwestern Idaho. It has been reported from 6 counties: Elmore, Ada, Boise, Gem, Payette and Washington.
Allium geyeri is a North American species of onion widespread in the western United States and in western Canada. It is found in the Rocky Mountain States from New Mexico to Idaho, Great Basin, the Pacific Northwest, Texas, South Dakota, Arizona, Manitoba, British Columbia, Alberta and Saskatchewan.
Allium macrum, the rock onion, is an American species of wild onion native to the eastern and central parts of the US States of Oregon and Washington. It grows on gravelly soils at elevations up to 1400 m. It is a perennial herb.
Allium madidum, common name mountain swamp onion, is a plant species native to the west-central Idaho, southern Washington and eastern Oregon. It grows in wet meadows at elevations of 1100–2000 m.
Allium perdulce, the Plains onion, is a plant species native to the central part of the United States and cultivated as an ornamental elsewhere. It has been found in Texas, New Mexico, Oklahoma, Kansas, Nebraska, South Dakota, and one county in western Iowa.
Allium robinsonii, the Columbia River onion or Robinson's onion, is a rare plant species native to the US States of Washington and Oregon, although some studies suggest that the Oregon populations may now be extinct. The species has been reported from five counties in Washington and five in Oregon. It is found in sand and gravel deposits along the lower Columbia River and some of its tributaries, usually at elevations less than 200 m. The species is also cultivated as an ornamental in other regions, including in Europe.
Allium runyonii is a North American species of wild onion native to southern Texas about as far north as Corpus Christi, as well as to the Mexican States of Nuevo León and Tamaulipas. It is found on sandy soils including in plains along the Río Grande.
Allium scilloides, called the fragile onion, is a plant species endemic to the US State of Washington. It has been reported from only 4 counties, all on the eastern side of the Cascade Range: Klickitat, Kittitas, Yakima and Grant. It grows on barren, gravelly slopes at elevations of 300–1300 m. The species is sometimes cultivated in other regions as an ornamental.
Allium brevistylum is a plant species native to the western United States. It grows in meadows and along stream banks high in the mountains of Colorado, Utah, Wyoming, Montana and Idaho, at elevations of 2200–3400 m.
Allium douglasii, the Douglas onion, is a plant species native to northeastern Oregon, eastern Washington, and northern Idaho. It grows in shallow soils at elevations of 400–1,300 m (1,300–4,300 ft).
Allium nevii, known by the common name Nevius' onion or Nevius' garlic, is a plant species native to central Washington and north-central Oregon in the United States. It grows in wet meadows and along stream banks at elevations up to 2000 m.
Allium crenulatum, common name Olympic onion, is a plant species native to Oregon, Washington, and British Columbia. It grows in the Cascades, the Coast Ranges, the Olympic Mountains, the Wenatchee Mountains, and the mountains on Vancouver Island. There is one report from Alabama, but this needs verification. The species grows on talus slopes and in alpine tundra at elevations of 600–2500 m.
