Reference:Keck1940a


Verbatim text: Keck, D. D. 1940b. Studies in Penstemon VII. The subsections Gairdneriani, Deusti, and Arenarii of the Graciles, and miscellaneous new species. Amer. Midl. Naturalist 23: 594–616.
Author: Keck, D.D.
Year: 1940b
Title: Studies in Penstemon VII. The subsections Gairdneriani, Deusti, and Arenarii of the Graciles, and miscellaneous new species
Journal: Amer. Midl. Naturalist
Volume: 23
Pages: 594–616