This genus was placed in the Monotropaceae in Michigan Flora.
All species found in Pterospora
Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. May 25, 2022. https://michiganflora.net/genus.aspx?id=Pterospora.