Barner, J. 2007. Propagation protocol for production of propagules (seeds, cuttings, poles, etc.) Penstemon speciosus. Dougl. ex Lindl. Seeds. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org [Accessed 2017 June 16].

Barner, J. 2007. Propagation protocol for production of propagules (seeds, cuttings, poles, etc.) Penstemon speciosus. Dougl. ex Lindl. Seeds. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org [Accessed 2017 June 16].

Find a Resource

Stay Connected