Verbatim text: Channell, R. B. 1957. A revision of the genus Marshallia (Compositae). Contr. Gray Herb. 81: 41–132.
Author: Channell, R.B.
Year: 1957
Title: A revision of the genus Marshallia (Compositae)
Journal: Contr. Gray Herb
Volume: 81
Pages: 41–132