Verbatim text: McMullen, A. L. 1998. Factors Concerning the Conservation of a Rare Shale Endemic Plant: The Reproductive Ecology and Edaphic Characteristics of Penstemon debilis (Scrophulariaceae). M.S. thesis. Utah State University.
Author: McMullen, A.L.
Year: 1998
Title: Factors Concerning the Conservation of a Rare Shale Endemic Plant: The Reproductive Ecology and Edaphic Characteristics of Penstemon debilis (Scrophulariaceae)