Wild Flowers of Zion and Bryce Canyon National Parks and Cedar Breaks National Monument

by Carl E. Jepson; Leland F. Allen

Jaeger, Edmund C.

Desert Wild Flowers. Stanford University Press, Revised Edition, 1944.

Joint Committee on Horticultural Nomenclature

Standardized Plant Names. Second Edition 1942. J. Horace McFarland Co.

Kearney, Thomas H. and Pebble, Robert H.

Arizona Flora. University of California Press, 1951.

McDougal, W. B. and Baggley, Herma A.

Plants of Yellowstone National Park. Revised Edition, Yellowstone Library and Museum Association, 1956.

McDougal, W. B. and Sperry, Omar E.

Plants of Big Bend National Park. Government Printing Office, 1951.