Verbatim text: Barkworth, M.E. 1983. Ptilagrostis in North America and its relationship to other Stipeae (Gramineae). Syst. Bot. 8:395-419
Author: Barkworth, M.E.
Year: 1983
Title: Ptilagrostis in North America and its relationship to other Stipeae (Gramineae)
Journal: Syst. Bot
Volume: 8
Pages: 395–419