Allium anceps, known as twinleaf onion and Kellogg's onion, is a species of wild onion native to the western United States. It is widespread in Nevada, extending into adjacent parts of California, Idaho, and Oregon. It grows in barren clay and rocky soils.
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 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 haematochiton is a North American species of wild onion known by the common name redskin onion. It is native to northern Baja California, Sonora, and southern California as far north as Kern County. It grows on the slopes of the hills and mountains, such as those of the Peninsular Ranges, Transverse Ranges, and southern California Coast Ranges.
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 campanulatum is a species of wild onion known by the common name dusky onion or Sierra onion. This is a flowering plant native to the western United States from southeastern Washington and northern Oregon to southern California, and western Nevada. The dusky onion grows in foothills and mountains, especially in dry areas, such as chaparral habitats.
Allium hyalinum is a Californian species of wild onion known by the common name glassy onion.
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
Allium tuolumnense is a rare species of wild onion, known by the common name Rawhide Hill onion.
Allium cratericola is a species of wild onion known by the common name Cascade onion. It is endemic to California, where is an uncommon member of the flora in several of the state's mountain ranges, including the northern and southern California Coast Ranges, the western Transverse Ranges, Klamath Mountains, and the Sierra Nevada foothills. Its range covers much of the state, from Riverside County to Siskiyou County.
Allium jepsonii is a species of wild onion known by the common name Jepson's onion, honoring renowned California botanist Willis Linn Jepson.
Allium lacunosum is a species of wild onion known by the common name pitted onion. It is endemic to California, where it is a common member of the flora in many types of habitat, from bayside to mountain to desert.
Allium parryi is a North American species of wild onion known by the common names Parry's onion and Parry's fringed onion. It is common in the Coast Ranges of southern California and northern Baja California. It is also known from the southernmost reaches of the Sierra Nevada.
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 tribracteatum, known by the common name Threebract onion, is a species of wild onion found in California.
Allium yosemitense is a California species of wild onion known by the common name Yosemite onion. Most of the known populations are situated within the boundaries of Yosemite National Park.
Chlorogalum grandiflorum is a species of flowering plant known by the common name Red Hills soap plant. It is endemic to the Sierra Nevada foothills, such as the Red Hills, of California, where it grows in chaparral, woodland, and forest.
Allium bisceptrum, also known as the twincrest onion or aspen onion, is a high elevation plant native to western United States. It is a perennial that thrives under damp and shady conditions or open meadows in California, Arizona, New Mexico, Nevada, Oregon, Washington, Idaho, and Utah.
