From, M. M., T. Gouveia, P. Read, and M. Cano. “Propagation and Population Augmentation for Platanthera Praeclara, A Threatened North American Orchid Species”. Selbyana, vol. 26, no. 1/2, June 2005, pp. 341-6, https://ojs.test.flvc.org/selbyana/article/view/121450.