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BULLETIN OF THE TORREY BOTANICAL CLUB
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Acknowledgments. The writer gratefully acknowledges the assistance
given by Mr. Kermit H. Larson, Dr. William A. Rhoads, and Dr. Thomas G.
Hennessy who read the manuscript in rough form and offered manyhelpful
suggestions for its improvement. Thanks are due also to Mr. Richard Rowland and Mrs. Ruth Pratt who did the art work, and to Mrs. Ann Kehrer and
Miss Lois Eby who helped in preparing the manuscript. Special thanks are
due to the biological faculty of Rutgers University and to the National
Science Foundation who madeit possible to present this paper at the 18th
Annual Meeting of the Bureau of Biological Research on April 27, 1962.
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