Reference:Steyermark1937a
Verbatim text: Steyermark, J. A. 1937. Studies in Grindelia. III. Ann. Missouri Bot. Gard. 24: 225–262.
Author: Steyermark, J.A.
Year: 1937
Title: Studies in Grindelia. III
Journal: Ann. Missouri Bot. Gard
Volume: 24
Pages: 225–262
BHL link: http://www.biodiversitylibrary.org/part/17445