Astragalus asymmetricus

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San Joaquin milkvetch
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Fabales
Family: Fabaceae
Genus: Astragalus
Species: A. asymmetricus
Binomial name
Astragalus asymmetricus

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 asymmetricus is a sturdy perennial herb growing a thick, erect stem to heights between 50 and 120 centimeters. It is coated in long hairs. The leaves are up to 20 centimeters long and are made up of many pairs of leaflike leaflets, each up to 2.5 centimeters long and varying in shape from linear to oval. The inflorescence contains 15 to 45 cream-colored pealike flowers 1 to 2 centimeters long.

The fruit is a slightly inflated hairy legume pod up to 4 centimeters long which hangs in bunches from the dried inflorescence.

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