Excerpt from Flora of PennsylvaniaIn this Flora analytical keys formed by the contrasting of diagnostic characters precede the families, genera and species, and a key to the orders precedes the main body of the work. A description and a figure is cited for each species for exam ple, Man. P. 469 refers to a description on page 469 in Brit ton's Manual of the Flora of the Northern States and Canada, while 11. Pi. F. 1753 refers to a figure in Britton Brown's Illustrated Flora of the Northeastern United States, Canada and the British Possessions. Following the known geograph ical distribution of each species, is recorded its distribution within the State, outlined by counties, as it wasknown to the author. The outline map of Pennsylvania was drawn for this work by Mr. Benj. H. Smith, who has also kindly read part of the proof.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.