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rimrock milkvetch

Scientific Name: Astragalus desperatus var. petrophilus

Family: Fabaceae

Category: Dicot

Growth: Subshrub, Forb/herb

Duration: Perennial

Other Names:

       

Rimrock Milkvetch (Astragalus desperatus)

Astragalus desperatus, commonly known as Rimrock Milkvetch, is a perennial herb belonging to the Fabaceae (Pea) family.

Considerations for Pets

  • As a member of the Astragalus genus, also known as locoweed, it's important to be aware of potential concerns.

Taxonomy and Nomenclature

  • Scientific Name: Astragalus desperatus M.E. Jones
  • Common Name: Rimrock Milkvetch
  • Family: Fabaceae (Pea Family or Leguminosae)
  • Genus: Astragalus L.
  • Taxonomic Rank: Species

Subordinate Taxa

  • Astragalus desperatus var. desperatus
  • Astragalus desperatus var. conspectus Barneby
  • Astragalus desperatus var. petrophilus M.E. Jones

Distribution and Habitat

  • Rimrock Milkvetch thrives in semi-desert environments and openings, often found in small pockets of soil on sandstone outcrops.
  • Observed locations include Alcove Nature Trail (Colorado National Monument, CO), Butler Wash, and Canyonlands.
  • It grows in cracks or eroded depressions on sandstone rimrock ledges and mesa tops.
  • This species is notably present in western Colorado and the Four Corners area.

Morphological Characteristics

  • Rimrock Milkvetch is a perennial herb, typically growing to a height of 0.4 to 1 foot (1 to 30 cm).
  • The plant is classified as a subshrub/forb/herb.