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Excerpt from Contributions From the United States National Herbarium, Vol. 10: Systematic Investigations in Phanerogams, Ferns, and Diatoms; North American Species of Festuca, Genus Ptelea in the Western and Southwestern United States and Mexico, Mexican and Central American Plants, Leguminosae of Porto Rico This treatment of the North American species of Festuca is based primarily on the material In the National Herbarium but through the courtesy of those having the collections In charge, we have been able to examine the material In the Gray Herbarium, the New York Botan ical Garden, the Academy of Natural Sciences of Philadelphia, the California Academy of Sciences, the Michigan Agricultural College, and the Geological and Natural History Survey of Canada. To all of these grateful acknowledgment Is made. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.