Landeen, M.; Jensen, S.L. 2022a. Propagation protocol for production of Propagules (plugs) Penstemon pachyphyllus A. Gray ex Rydb. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2022/10/31). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.

Landeen, Melissa; Jensen, Scott L. 2022a. Propagation protocol for production of Propagules (plugs) Penstemon pachyphyllus A. Gray ex Rydb. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2022/10/31). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.

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