Synonyms
Astragalus purshii var. incurvus (Rydb.) Jeps.
Astragalus purshii var. ordensis (Jeps.) Jeps.
Astragalus purshii var. interior M.E.Jones
Astragalus purshii var. gavisus Jeps.
Xylophacos purshii var. interior (M.E.Jones) Moldenke
Astragalus inflexus var. ordensis Jeps.
Xylophacos incurvus Rydb.
Phaca mollissima Nutt.