Astragalus wootonii E. Sheld. var. wootonii Astragalus wootonii E. Sheld. var. wootonii in Minnesota Bot. Stud. 1(3): 138. 1894 sec. Téllez-Valdés 2009=Phaca triflora DC., Astragalogia 1802: 62, pl. 1. 1802 syn. sec. ???