SafePlants

Astragalus purshii: Woollypod Milkvetch

Astragalus purshii is a species of milkvetch, widely known by the common names woollypod milkvetch and Pursh's milkvetch.

Considerations for Pets

• This plant is sometimes referred to as Woollypod Locoweed.

Taxonomy and Nomenclature

• Scientific Name: Astragalus purshii Dougl. ex Hook.
• Family: Fabaceae (Pea Family)
• Kingdom: Plantae
• Taxonomic Rank: Species; includes subspecies and varieties such as Astragalus purshii Douglas ex Hook. var. purshii and Astragalus purshii var. concinnus, as well as Astragalus purshii var lectulus.
• Synonyms: Pursh's milkvetch, Pursh loco.

Distribution and Habitat

• Astragalus purshii is native to much of western North America.
• It is found at high elevations, such as along the Dalles Mt. Road.
• Observed in locations like the Cowiche Canyon uplands and Big Bear Valley.
• Specific locations include west of Blue Canyon, Tooele County, Utah.

Morphological Characteristics and Growth Habits

• It is a native perennial herb.
• The plant tufts from a woody base.
• The stem can grow up to 6 inches tall.
• Stems and leaves are covered with fine, wavy, entangled silver or gray hair, giving it a woolly appearance.

Traditional Uses

• A decoction of the whole plant has been used as a wash for the head, hair, and whole body.

Ecological Role

• Astragalus purshii frequently co-occurs with Astragalus peckii.

Quirky Facts

• One source noted that it was one of only two plants of this species that was in bloom on a specific date (April 10) in a particular location.

Further Resources

• EDDMapS (Early Detection & Distribution Mapping System) - The University of Georgia - Center for Invasive Species and Ecosystem Health.
• Discover Life