Verbatim text: Verhoek, S. E. 1975. A Study of the Tribe Poliantheae (Including Manfreda) and Revisions of Manfreda and Prochnyanthes (Agavaceae). Ph.D. thesis. Cornell University.
Author: Verhoek, S.E.
Year: 1975
Title: A Study of the Tribe Poliantheae (Including Manfreda) and Revisions of Manfreda and Prochnyanthes (Agavaceae)