The Plants of Pennsylvania: An Illustrated Manual
: Ann Fowler Rhoads/Timothy A. Block/Anna Anisko
: UNIV OF PENNSYLVANIA PR
The second edition of "The Plants of Pennsylvania" is the authoritative guide to identifying the nearly 3,400 species of flowering plants, ferns, and gymnosperms native or naturalized in the Commonwealth. It features a complete reorganization into a genetic scheme that reflects recent advances in our understanding of plant relationships.
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