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.
Allium acuminatum, also known as the tapertip onion or Hooker's onion, is a species in the genus Allium native to North America.
Wislizenia is a genus of flowering plants containing three recognized species native to the southwestern United States and northern Mexico. Common names include spectacle fruit and jackass clover. Like genus Cleome and several relatives, Wislizenia has traditionally been included in the caper family, Capparaceae, but has more recently been moved to the new family Cleomaceae.
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 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.
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 in 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.
Wyethia arizonica, the Arizona mule's ears, is a plant species native to Arizona, Colorado, New Mexico and Utah. It grows in meadows in coniferous forests at elevations of 600–3,000 m (2,000–9,800 ft).
Tonestus graniticus, common names granite serpentweed and Lone Mountain serpentweed, is a rare endemic plant species known only from the east side of Lone Mountain in Esmeralda County, Nevada, about 20 km west of Tonopah. It grows there in the crevices of granitic outcrops.
Cirsium barnebyi, or Barneby's thistle, is a North American plant species native to the Rocky Mountains of the western United States. It grows in juniper woodlands, sagebrush scrub, etc., at elevations of 1,600–2,600 m (5,200–8,500 ft). It is reported from 6 counties in 3 states: Rio Blanco and Garfield Counties, Colorado; Uintah, Carbon and Duchesne Counties, Utah; and Carbon County, Wyoming.
Caulanthus barnebyi, the Black Rock wild cabbage, is a plant species endemic to a small region in the US State of Nevada. It is known only from the Black Rock Mountains in Humboldt and Pershing Counties in the northwestern part of the state. It grows on dry, rocky slopes and outcrops at elevations of 4,300–4,900 feet (1,300–1,500 m).
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).
Lepidium nanum, the dwarf pepperweed, is a plant species native to the US states of Nevada and Utah. It is known from four counties in Nevada but only one in Utah. It occurs in open, sunlit areas in the desert, often with gypsum, limestone, quartzite or chalky soils.
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.
Allium brandegeei is a plant species native to the western United States. It has been reported from western Colorado, Utah, Idaho, eastern Oregon, Park County, Montana and Elko County, Nevada.
Allium passeyi is a plant species endemic to Box Elder County in northwestern Utah. It grows in shallow, stony locations at elevations of 1400–1600 m.
Erigeron religiosus is a North American species of flowering plant in the family Asteraceae known by the common name Clear Creek fleabane . It is native to the southwestern United States, in southern Utah and northern Arizona.
Patricia Holmgren is an American botanist. Holmgren's main botanical interests are the flora of the U.S. intermountain west and the genera Tiarella and Thlaspi. Holmgren was the director of the herbarium at the New York Botanical Garden from 1981–2000, and editor of Index Herbariorum from 1974–2008.
