Verbatim text: Clements, R. K., J. M. Baskins, and C. C. Baskins. 1998b. The comparative biology of the two closely-related species Penstemon tenuiflorus Pennell and P. hirsutus (L.) Willd. (Scrophulariaceae, section Graciles): II. Reproductive biology. Castanea 63: 299–309.
Author: Clements, R.K., Baskins, J.M., Baskins, C.C.
Year: 1998b
Title: The comparative biology of the two closely-related species Penstemon tenuiflorus Pennell and P. hirsutus (L.) Willd. (Scrophulariaceae, section Graciles): II. Reproductive biology
Journal: Castanea
Volume: 63
Pages: 299–309