Claim: Astragalus humillimus, federally listed endangered species, is a small perennial plant 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. This is a small perennial herb forming low tufts up to 30 centimeters wide in cracks and sandy depressions in sandstone cliffs and pavement.