Verbatim text: Van Eseltine, G. P. 1918. The allies of Selaginella rupestris in the southeastern United States. Contr. U.S. Natl. Herb. 20(5): 159--172.
Author: Van Eseltine, G.P.
Year: 1918
Title: The allies of Selaginella rupestris in the southeastern United States
Journal: Contr. U.S. Natl. Herb
Volume: 20
Pages: 159–172