Purshia mexicana is a species of perennial flowering small tree in the rose family known by the common name Mexican cliffrose. It is native to western-northern Mexico, the region of the Sierra Madre Occidental cordillera.
^Ito H, Miyake M, Nishitani E, Mori K, Hatano T, Okuda T, Konoshima T, Takasaki M, Kozuka M, Mukainaka T, Tokuda H, Nishino H, Yoshida T (August 1999). "Anti-tumor promoting activity of polyphenols from Cowania mexicana and Coleogyne ramosissima". Cancer Lett. 143 (1): 5–13. doi:10.1016/S0304-3835(99)00160-3. PMID10465331.
Cronquist, A.; Holmgren, N.H.; Holmgren, P.K.; Cronquist, A. (1997). Subclass Rosidae (except Fabales). Intermountain flora: Vascular plants of the Intermountain West, U.S.A. Vol. 3A. The New York Botanical Garden. ISBN0893273740.