Orbexilum pedunculatum (P. Mill.) Rydb.
Engl.: Sampson's snakeroot, Bob's root, Congo root, Samson snake-root.
Bot. syn.: Hedysarum pedunculatum P. Mill., Psoralea melilotoides Michx., Psoralea pedunculata (P. Mill.) Vail, Psoralea psoralioides (Walt.) Cory.