Synonyms
Astragalus amphioxys var. modestus Barneby
Xylophacos aragalloides Rydb.
Astragalus crescenticarpus E.Sheld.
Astragalus marcusjonesii Munz
Astragalus selenaeus Greene
Astragalus shortianus var. minor A.Gray
Astragalus amphioxys var. melanocalyx Tidestr.
Xylophacos melanocalyx Rydb.
Astragalus amphioxys var. cymbellus M.E.Jones