Descurainia obtusa (Greene) O.E. Schulz Descurainia obtusa (Greene) O.E. Schulz, Pflanzenr. (Engler) IV. 105(Heft 86): 321. 1924 sec. Rollins 1993≡Sophia obtusa Greene in Leafl. Bot. Observ. Crit. 1(7): 96. 1904 syn. sec. Rollins 1993