Verbatim text: Clausen, R. T. 1946. Selaginella subgenus Euselaginella, in the southeastern United States. Amer. Fern J. 36: 65--82.
Author: Clausen, R.T.
Year: 1946
Title: Selaginella subgenus Euselaginella, in the southeastern United States
Journal: Amer. Fern J
Volume: 36
Pages: 65–82