Astragalus asymmetricus is a species of milkvetch known by the common name San Joaquin milkvetch. It is endemic to California, where it grows in grassy and disturbed areas in the Central Valley and nearby parts of the Central Coast Ranges and San Francisco Bay Area.
Astragalus casei is a species of milkvetch known by the common name Case's milkvetch. It is native to the Mojave Desert and its sky island woodlands of eastern California and western Nevada.
Astragalus cimae is a species of milkvetch known by the common name Cima milkvetch. It is native to the Mojave Desert and its sky island woodlands of eastern California western Nevada, especially on calcareous soils, including the Cima Dome area in the Mojave National Preserve.
Astragalus claranus is a rare species of milkvetch known by the common names Clara Hunt's milkvetch and Napa milkvetch. It is endemic to northern California where it is known from only four or five occurrences along the border between Sonoma and Napa Counties. It is a federally listed endangered species.
Astragalus didymocarpus is a species of milkvetch known by the common names Dwarf white milkvetch and Two-seeded milkvetch. It is native to the southwestern United States and northern Mexico, where it can be found in many types of habitat.
Astragalus filipes is a species of milkvetch known by the common name basalt milkvetch. It is native to western North America from British Columbia to California to Utah, where it grows in many types of habitat, especially dry areas.
Astragalus mohavensis is a species of milkvetch known by the common name Mojave milkvetch. It is native to the Mojave Desert of California and Nevada.
Astragalus monoensis is a rare species of milkvetch known by the common name Mono milkvetch. It is endemic to the open pumice plains of central Mono County, California.
Astragalus oophorus is a species of milkvetch known by the common name egg milkvetch. It is native to the western United States, mainly California and Nevada, though one variety can be found as far east as Colorado. It is a plant of sagebrush and other dry habitat.
Astragalus panamintensis is a species of milkvetch known by the common name Panamint milkvetch.
Astragalus pauperculus is an uncommon species of milkvetch known by the common name depauperate milkvetch. It is endemic to northern California, where it is known from the northern Sacramento Valley and the lowest reaches of the Cascade foothills adjacent. It grows in chaparral and vernally wet grassland habitat. This is a very small annual milkvetch which grows in a delicate mat with stems no longer than 10 cm (3.9 in). The leaves are a few centimeters long and are made up of small widely spaced leaflets. The inflorescence bears two to seven flowers which are purple, sometimes with paler colored edges on their petals. Each flower is generally less than 1 cm (0.39 in) long. The fruit is a crescent-shaped legume pod between 1 and 2 cm long.
Astragalus platytropis is a species of milkvetch known by the common name broadkeel milkvetch. It is native to the western United States from Montana to California, where it lives at high elevation in alpine and subalpine plant communities. This is a small perennial milkvetch which forms a small patch of short silvery-green stems on rocky ground. The leaves may be up to 9 cm (3.5 in) long and are made up of several hairy leaflets. The inflorescence is a head of four to nine pale purple flowers, each just under 1 cm (0.39 in) long. The fruit is a bladdery legume pod which can exceed 3 cm (1.2 in) long.
Astragalus purshii is a species of milkvetch known by the common names woollypod milkvetch and Pursh's milkvetch.
Astragalus tener is a species of milkvetch known by the common name alkali milkvetch. It is endemic to California, where it grows in both coastal and inland areas such as the Central Valley, especially in moist places.
Astragalus tricarinatus is a rare species of milkvetch known by the common name triplerib milkvetch, or triple-ribbed milkvetch.
Astragalus applegatei is a rare species of milkvetch known by the common name Applegate's milkvetch. Its scientific name is also spelt Astragalus applegatii. It is endemic to Klamath County, Oregon, where it is known from three populations, one of which is made up of only three plants. Much of the remaining habitat is seriously threatened by development, introduced plant species, and other forces. This is a federally listed endangered species of the United States.
Astragalus osterhoutii, or the Osterhout milkvetch or Kremmling milkvetch, is an endangered species of milkvetch, discovered and collected in 1905 at Sulfur Spring in Grand County Colorado by Colorado botanist George Everett Osterhout for which the plant was named. It is found in the U.S. state of Colorado, in a 13 kilometres (8.1 mi) radius near the town of Kremmling.
Astragalus hypoxylus is a rare species of flowering plant in the legume family known by the common name Huachuca milkvetch, or Huachuca Mountain milkvetch. It is endemic to Arizona in the United States, where it is known only from the Patagonia and Huachuca Mountains. There are three populations.
Astragalus microcymbus is a species of flowering plant in the legume family known by the common name Skiff Milkvetch. It is endemic to Colorado in the United States, where it is known from Gunnison County and the edge of Saguache County. It was discovered in 1945 by Rupert Barneby, a British botanist. Currently, Skiff Milkvetch is experiencing population declines and is listed as Threatened.
Astragalus preussii is an annual or perennial plant in the legume family (Fabaceae) found in the Colorado Plateau and Canyonlands region of the southwestern United States.
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