Verbatim text: Phillips, R. B. 1980. Systematics of Parnassia L. (Parnassiaceae): Generic Overview and Revision of North American Taxa. Ph.D. dissertation. University of California, Berkeley.
Author: Phillips, R.B.
Year: 1980
Title: Systematics of Parnassia L. (Parnassiaceae): Generic Overview and Revision of North American Taxa