Title: The Plants of Pennsylvania: An Illustrated Manual, Author: Ann Fowler Rhoads
Title: Self-Incompatibility in Flowering Plants: Evolution, Diversity, and Mechanisms / Edition 1, Author: Vernonica E. Franklin-Tong
Title: Vascular Flora of Pennsylvania: Annotated Checklist and Atlas, Memoirs, American Philosophical Society (vol. 207), Author: William McKinley Klein Jr.
Title: Evolution and Biogeography: Volume 8, Author: Martin Thiel
Title: Urban Evolutionary Biology, Author: Marta Szulkin
Title: Contemporary Plant Systematics / Edition 4, Author: Dennis W. Woodland
Title: Rights to Plant Genetic Resources and Traditional Knowledge: Basic Issues and Perspectives, Author: Susette Biber-Klemm