DeBolt, A.; Parkinson, H. 2005. Propagation protocol for production of container (plug) Machaerathera canescens (Pursh) A. Gray plants 2.875-inch x 5.5-inch plant band (container). Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://NativePlantNetwork.org [Accessed 2017 July 21].