SafePlants

Lesser Rushy Milkvetch (Astragalus convallarius)

The plant can be referred to as lesser rushy milkvetch (Astragalus convallarius) and Rushy Milkvetch (Astragalus lonchocarpus). It is important to note that these are two different plants with similar common names.

Considerations for Pets

• The text mentions that *Astragalus* species are referred to as "locoweeds" or "milkvetch." Further research is suggested to understand the implications of this designation.

Taxonomy and Nomenclature

• Scientific Name: Astragalus convallarius Greene
• Common Names: Lesser Rushy Milkvetch, Timber Milkvetch
• Family: Fabaceae (Legume Family)
• Synonyms: *Astragalus junciformis* (Astragalus convallarius var. *convallarius*)
• Taxonomic Rank: Variety (e.g., *Astragalus convallarius* var. *margaretiae* Barneby, *Astragalus convallarius* var. *finitimus*, *Astragalus convallarius* var. *submutica*, *Astragalus convallarius* var. *convallarius*)

Distribution and Habitat

• Astragalus convallarius is classified as imperiled in the state of Montana.
• It is found in specific habitats within Montana.
• Grows in western Colorado (Astragalus convallarius var. *submutica*).

Morphological Characteristics

• Astragalus convallarius is a forb/herb (a non-woody plant that is not a grass).
• During autumn, lesser rushy milkvetch assumes a yellow color.

Ecological Role

• Astragalus convallarius grows directly with *Calochortus ciscoensis* and *Cymopterus duchesnensis*.

Additional Information

• The Margaret Rushy Milkvetch (*Astragalus convallarius* var. *margaretiae*) is listed as "Sensitive" by the Heritage Program, with ranks G5 T2 S2.

Resources

• Discover Life provides information about the biology, natural history, ecology, identification, and distribution of Astragalus convallarius.
• WildflowersWest provides information on the species.
• Wolfram|Alpha offers facts and data related to the plant.