SafePlants

Astragalus johannis-howellii (Long Valley Milkvetch)

Astragalus johannis-howellii, commonly known as Long Valley Milkvetch, is a perennial herb belonging to the milkvetch genus. This plant is recognized for its presence in specific regions of California and Nevada.

Considerations for Pets

• Some species within the Astragalus genus are known as "locoweed," particularly in North America.
• The text mentions long hairs on the flower stem and calyx.

Considerations for Children

• The plant forms loose mats or tufts.
• The text mentions long hairs on the flower stem and calyx.

Taxonomy and Nomenclature

• Scientific Name: Astragalus johannis-howellii Barneby
• Common Name: Long Valley Milkvetch
• Kingdom: Plantae
• Taxonomic Rank: Species
• Family: Fabaceae
• Synonyms: The text also mentions "Lane Mountain milkvetch," "Tygh Valley milkvetch", "Sweetwater Mountains milk-vetch", "Coachella Valley Milkvetch", "Freckled Milk-vetch", "San Antonio milk-vetch" and "Fish Slough Milk-vetch", although these are likely different species.

Distribution and Habitat

• Astragalus johannis-howellii is native to eastern California, including Long Valley, and Nevada.
• It is known from approximately 20 sites in California.
• Specific locations include Owens Valley, Whitmore Hot Springs, and Little Long Valley.

Morphological Characteristics and Growth Habits

• It is a densely villous-tomentose perennial.
• It arises from a thick root 55 cm long.
• It is prostrate to weakly ascending, forming loose mats or tufts.
• It is a subshrub forb/herb.
• Stems can be 1/2 to 6 inches long and hairy.
• Internodes are 2-3 mm long and covered by appressed white hairs.

Light and Exposure

• The Long Valley milkvetch prefers full sun.