Reference:Weatherby1920a
Verbatim text: Weatherby, C. A. 1920. Varieties of Pityrogramma triangularis. Rhodora 22: 113--120.
Author: Weatherby, C.A.
Year: 1920
Title: Varieties of Pityrogramma triangularis
Journal: Rhodora
Volume: 22
Pages: 113–120