Kramer, A.; Foxx, A. 2016. Propagation protocol for production of propagules (seeds, cuttings, poles, etc.) Sphaeralcea parvifolia seeds. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://npn.rngr.net/propagation/protocols [Accessed 2018 June 29].