Psoralea tenuiflora Pursh Psoralea tenuiflora Pursh, Fl. Amer. Sept. 2: 475. 1813 ["1814"] sec. Tropicos 2013=Psoralidium tenuiflorum (Pursh) Rydb., N. Amer. Fl. 24(1): 15. 1919 syn. sec. Tropicos 2013