Indigofera constricta Rydb. Indigofera constricta Rydb., N. Amer. Fl. 24(3): 145. 1923 sec. McVaugh 1987=Indigofera langlassei Rydb., N. Amer. Fl. 24(3): 147. 1923 syn. sec. McVaugh 1987=Indigofera torulosa Hook. & Arn., Bot. Beechey Voy. 286. 1838 syn. sec. McVaugh 1987