Coefficient of Conservatism:
Coefficient of Wetness:
A tall, long-needled, western North American species sometimes planted in Michigan and rarely escaped into dry, sandy fields; collected by W. S. Martinus in Muskegon Co. in 2009. Our plants are var. ponderosa.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 15, 2019. https://michiganflora.net/species.aspx?id=2871.