Treated by S. Watson as Thelypodium cooperi, this species was originally published in The Proceedings of the American Academy of Arts and Sciences 12: 246. 1877.; then later, treated as Caulanthus cooperi by Payson, in Annals of the Missouri Botanical Garden 9(3): 293. 1922[1923]. "Name - Caulanthus cooperi (S.Watson) Payson". Tropicos. Saint Louis, Missouri: Missouri Botanical Garden. Retrieved May 17, 2010.