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 cernuum, known as nodding onion or lady's leek, is a perennial plant in the genus Allium. It grows in open areas in North America.
Allium acuminatum, also known as the tapertip onion or Hooker's onion, is a species in the genus Allium native to North America.
Allium crispum is a species of wild onion known by the common name crinkled onion. It is endemic to California, where it grows along the Central Coast in the Coast Ranges and in the Santa Monica Mountains, often in clays and serpentine soils. It is a perennial herb that is typically found in the foothill woodlands and valley grasslands of California.
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 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 fimbriatum is a species of wild onion known by the common name fringed onion. It is native to California and Baja California.
Allium shevockii is a rare species of wild onion known by the common name Spanish Needle onion. It is found only in a limited area in the southern Sierra Nevada of California.
Allium abramsii is a species of wild onion known by the common name Abrams' onion.
Allium denticulatum is a species of wild onion known by the common name toothed wild onion. It is endemic to southern California, where it grows in the western Mojave Desert, the adjacent Tehachapi Mountains, the southern Sierra Nevada, and the Palomar Mountains. It is reported from Kern, San Bernardino, Riverside, Ventura, San Diego Counties.
Allium hoffmanii is a species of wild onion known by the common name beegum onion. It is native to northern California, where it grows in the serpentine soils of the local mountain ranges in Siskiyou, Humboldt, Trinity, Shasta, and Tehama Counties.
Allium monticola is an uncommon species of wild onion known by the common name San Bernardino Mountain onion. It is endemic to southern California, where it is found in the Transverse Ranges and the northernmost section of the Peninsular Ranges. It has been reported from San Bernardino, Los Angeles, Orange, Ventura and Santa Barbara Counties.
Allium praecox is a species of wild onion known by the common name early onion.
Allium siskiyouense is a North American species of wild onion known by the common name Siskiyou onion. It is native to the Klamath Mountains and nearby ranges of northern California and Oregon. It grows in serpentine and other rocky soil types.
Toxicoscordion paniculatum is a species of flowering plant known by the common names foothill deathcamas, panicled death-camas, and sand-corn. It is widely distributed across much of the western United States, especially in the mountains and deserts of the Great Basin region west of the Rocky Mountains. It grows in many types of habitat, including sagebrush plateau, grasslands, forests, and woodlands, etc.
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 gooddingii is a species of wild onion known by the common name Goodding's onion. It is native to Arizona and New Mexico in the United States.
Allium columbianum, the Columbian onion, is a species of onion native to eastern Washington, northern Idaho, and the Bitterroot Mountains of western Montana. It is a perennial herb that grows on shallow, wet soils at elevations of 300–1100 m.
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 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.
