Astragalus inversus is a species of milkvetch known by the common name Susanville milkvetch.
It is endemic to the northeastern corner of California, between 900–1,980 metres (2,950–6,500 ft) in elevation. It grows in southern Cascade Range Yellow pine forests and dry Great Basin Sagebrush scrub habitats.
Astragalus inversus is a perennial herb with slender, wiry, mostly leafless stems growing 20 to 50 centimeters long. They grow upright or form a spreading clump. The leaves are up to 12 centimeters long and are made up of a few small, widely spaced narrow leaflets.
The inflorescence is a loose array of 5 to 12 pale to reddish pink flowers, sometimes tinted with yellow. Each flower is about a centimeter long.
The fruit is a hanging legume pod 2 to 3.5 centimeters long, narrow and flat in shape and drying to a hairy, papery texture.
- CalFlora database: Astragalus inversus (Susanville milk vetch)
- Jepson Manual Treatment: Astragalus inversus
- USDA Plants Profile: Astragalus inversus (Susanville milkvetch)
- Astragalus inversus — U.C. Photo gallery
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