↑ Hitchcock, C.L., A. Cronquist, M. Ownbey, and J.W. Thompson. 1959. Vascular plants of the Pacific northwest. The New York Botanical Garden, Bronx, NY.
↑ {Dorn, R.D. 1992. Vascular plants of Wyoming. Second edition. Mountain West Publishing, Cheyenne, WY}
This page is based on this Wikipedia article Text is available under the CC BY-SA 4.0 license; additional terms may apply. Images, videos and audio are available under their respective licenses.