Astragalus oocarpus

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Astragalus oocarpus
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Genus: Astragalus
A. oocarpus
Binomial name
Astragalus oocarpus

Astragalus oocarpus is a rare species of milkvetch known by the common names San Diego milkvetch and Descanso milkvetch.

It is endemic to southern California, where it is known only from the Peninsular Ranges of San Diego County. Its range may extend north into Riverside County.[1] It is a plant of the chaparral slopes and woodlands of the mountains.


Astragalus oocarpus is a perennial herb producing upright to erect hollow stems up to 1.3 meters tall. Leaves are up to 17 centimeters long and are made up of veiny lance-shaped leaflets each up to 3 centimeters in length. The stem and leaves are mostly hairless.

The inflorescence holds up to 75 cream-colored flowers, each between 1 and 2 centimeters in length. The fruit is an inflated legume pod 1.5 to 2.5 centimeters long which dries to a stiff papery texture.

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