Reference:Engelmann1882a
Verbatim text: Engelmann, G. 1882. The genus Isoëtes in North America. Trans. Acad. Sci. St. Louis 4: 358--390.
Author: Engelmann, G.
Year: 1882
Title: The genus Isoëtes in North America
Journal: Trans. Acad. Sci. St. Louis
Volume: 4
Pages: 358–390