Astragalus tolucanus B.L. Rob. & Seaton Astragalus tolucanus B.L. Rob. & Seaton in Proc. Amer. Acad. Arts 28: 104. 1893 sec. Téllez-Valdés 2009=Atelophragma bracteatum Rydb. in Bull. Torrey Bot. Club 55: 161. 1928 syn. sec. Téllez-Valdés 2009