Reference:Piper1906a
Verbatim text: Piper, C.V. 1906. North American species of Festuca Contr. U.S. Natl. Herb. 101:1-48, vi-ix
Author: Piper, C.V.
Year: 1906
Title: North American species of Festuca
Journal: Contr. U.S. Natl. Herb.
Volume: 101
Pages: 1–48, vi-ix