Parkinson, H.; DeBolt, A. 2005. Propagation protocol for production of container Penstemon acuminatus. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org
Parkinson, H.; DeBolt, A. 2005. Propagation protocol for production of container Penstemon deustus. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org
Parkinson, H.; DeBolt, A. 2005. Propagation protocol for production of container Penstemon speciosus. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org
Parkinson, H.; DeBolt, A. 2005. Propagation protocol for production of container Penstemon speciosus. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org
Tilley, D.; St. John, L.; Ogle, D.; Shaw, N. 2012. Propagation protocol for production of Lomatium grayi seeds. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org
Tilley, D.; St. John, L.; Ogle, D.; Shaw, N.; Cane, J. 2012. Propagation protocol for production of Lomatium dissectum seeds. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org
Tilley, D.; St. John, L.; Ogle, D.; Shaw, N.; Cane, J. 2012. Propagation protocol for production of Lomatium triternatum seeds. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org
Jensen, S.L. 2007. Propagation protocol for production of container Agoseris glauca. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org
Jensen, S.L. 2007. Propagation protocol for production of container Agoseris aurantiaca. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org
Roberts, F. Leland. 2007. Investigation into seed collection practices and shrub manipulations to improve sustainable seed yield in wildland stands of bitterbrush (Purshia tridentata). Provo, UT: Brigham Young University. Thesis. 35 p.