Allium validum, known by several common names including swamp onion, wild onion, Pacific onion, and Pacific mountain onion, 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.
Allium cernuum, known as nodding onion or lady's leek, is a perennial plant in the genus Allium. It grows in dry woods, rock outcroppings, and prairies. It has been reported from much of the United States, Canada and Mexico including in the Appalachian Mountains from Alabama to New York State, the Great Lakes Region, the Ohio and Tennessee River Valleys, the Ozarks of Arkansas and Missouri, and the Rocky and Cascade Mountains of the West, from Mexico to Washington. It has not been reported from California, Nevada, Florida, Louisiana, Mississippi, New Jersey, Delaware, New England, or much of the Great Plains. In Canada, it grows from Ontario to British Columbia.
Cordylanthus capitatus, the Yakima bird's-beak or clustered bird's-beak, is an uncommon plant of the Western U.S.
Allium acuminatum, also known as the tapertip onion or Hooker's onion, is a species in the genus Allium native to North America.
Wislizenia refracta, common names jackass-clover or spectacle fruit, is one of the three recognized species in its genus Wislizenia, although some authors have suggested considering them as subspecies. Wislizenia refracta is native to northwestern Mexico and the southwestern United States. It has been reported from Chihuahua, Sonora, trans-Pecos Texas, New Mexico, Arizona, Utah, Nevada and from California. The species occurs in sandy flats, in desert scrub, and on disturbed sites such as roadsides.
Allium atrorubens is a species of wild onion known by the common name dark red onion. This plant is native to the southwestern United States where it grows in the sandy soils of the Mojave Desert, the Great Basin and higher-elevation deserts in Nevada, eastern California southwestern Utah, northwestern Arizona.
Allium lemmonii is a species of wild onion known by the common name Lemmon's onion, named for botanist John Gill Lemmon (1831–1908). It is native to the western United States, at elevations of 1200–1900 m in the Great Basin of Utah, Nevada, northern and eastern California, eastern Oregon, southwestern Idaho.
Allium nevadense is a species of wild onion known by the common name Nevada onion. It is native to the western United States where it grows in sand and rocky soil at elevations of 1400–1700 m. The species is widespread in Utah, Nevada and southern Idaho, and has been reported also from southeastern California, northwestern Arizona, western and central Colorado and eastern Oregon.
Allium parvum is an American species of wild onion known by the common name small onion. It is native to the western United States where it is a common member of the flora in rocky, dry areas in mountainous areas, especially in talus at elevations of 1,200–2,800 m (3,900–9,200 ft). It is widespread in California, Nevada, Oregon and Idaho, and also reported from western Utah and from extreme southwestern Montana
Galium matthewsii is a species of flowering plant in the coffee family known by the common names bushy bedstraw and Matthews' bedstraw. It is native to the mountains and deserts of southeastern California, and southern Nevada.
Galium multiflorum is a species of flowering plant in the coffee family known by the common names Kellogg's bedstraw, shrubby bedstraw, and many-flowered bedstraw.
Goodyera oblongifolia is a species of orchid known by the common names western rattlesnake plantain and giant rattlesnake plantain. It is native to much of North America, particularly in the mountains of the western United States and Canada, from Alaska to northern Mexico, as well as in the Great Lakes region, Maine, Quebec and the Canadian Maritime Provinces.
Allium punctum is a species of wild onion known by the common name dotted onion or Modoc onion. It is native to the western United States in and around the Modoc Plateau in northeastern California, northwestern Nevada, and southeastern Oregon. It is uncommon, growing volcanic flatlands created by old lava flows.
Galium serpenticum is a species of flowering plant in the coffee family known by the common name intermountain bedstraw or many-flowered bedstraw. It is native to the northwestern United States, where it grows in mountain forests and meadows, mostly east of the crest of the Cascade Range. It occurs in Washington, Oregon, Idaho and extreme northern California.
Glossopetalon spinescens is a species of flowering shrub in the family Crossosomataceae known by the common names spiny greasebush, spiny greasewood and Nevada greasewood.
Menodora scabra is broom-like shrub in the Olive Family (Oleaceae), known by the common name rough menodora or broom twinberry. It is a popular desert garden plant.
Purshia stansburyana is a species of flowering plant in the rose family known by the common name Stansbury's cliffrose. It is native to the southwestern United States and northern Mexico, where it grows in woodlands, desert, and plateau habitat. It often grows anchored on cliffs and prefers rocky, granular soils, especially limestone.
Descurainia paradisa is a plant species native to eastern and northern California, southeastern Oregon, Box Elder County in northwestern Utah, and most of Nevada. It grows in shrub communities at elevations of 3,300–7,500 feet (1,000–2,300 m).
Thelypodium laxiflorum, the droopflower thelypody, is a plant species native to the southwestern United States. It grows in open, rocky places on slopes and cliff faces, usually in pinyon-juniper woodlands at elevations of 4,900–10,200 feet (1,500–3,100 m). It has been reported from Utah, western Colorado, southern Nevada, northwestern Arizona, and northwestern New Mexico.
Erigeron religiosus is a North American species of flowering plant in the daisy family known by the common name Clear Creek fleabane . It is native to the southwestern United States, in southern Utah and northern Arizona.
