Verbatim text: Nesom, G. L. 1990i. Studies in the systematics of Mexican and Texan Grindelia (Asteraceae: Astereae). Phytologia 68: 303–332.
Author: Nesom, G.L.
Year: 1990i
Title: Studies in the systematics of Mexican and Texan Grindelia (Asteraceae: Astereae)
Journal: Phytologia
Volume: 68
Pages: 303–332
BHL link: http://www.biodiversitylibrary.org/part/5803