Claim: Astragalus humillimus, a federally listed endangered species of milkvetch known by the common name Mancos milkvetch, is a small perennial herb forming low tufts up to 30 centimeters wide in cracks and sandy depressions in sandstone cliffs and pavement.
Evidence: It is a federally listed endangered species. Astragalus humillimus is a rare species of milkvetch known by the common name Mancos milkvetch. This is a small perennial herb forming low tufts up to 30 centimeters wide in cracks and sandy depressions in sandstone cliffs and pavement.