Verbatim text: Payson, E. B. 1917. The perennial scapose drabas of North America. Amer. J. Bot. 4: 253–267.
Author: Payson, E.B.
Year: 1917
Title: The perennial scapose drabas of North America
Journal: Amer. J. Bot
Volume: 4
Pages: 253–267