Vol. Ill 



MARCH, 1920 



No. 



ENTRIES 458 871 



Botanical Abstracts 



A monthly serial furnishing abstracts and citations of publications in the international 



field of botany in its broadest sense. 



PUBLISHED MONTHLY 

 UNDER THE DIRECTION OF 



THE BOARD OF CONTROL OF BOTANICAL ABSTRACTS, INC. 



EDITORIAL BOARD 



Burton E. Livingston, Editor-in-Chief 



The Johns Hopkins University, Baltimore, Maryland 



Edward W. Berry, The Johns Hopkins 

 University, Baltimore, Md., Editor for 

 Paleobotany and Evolutionary History. 



H. C. Cowles, The University of Chicago, 

 Chicago, 111., Editor for Ecology and 

 Plant Geography. 



B. M. Duggar, Missouri Botanical Garden, 



St. Louis, Mo.. Editor for Physiology. 



Alexander W. Evans, Yale University, 

 New Haven, Conn., Editor for Morphol- 

 ogy and iaxonomy of Bryophyles. 



C. Stuart Gager, Brooklyn Botanic 

 Garden, Brooklyn, N. Y., Editor for 

 Botanical Education. 



J. H. Gotjrley, New Hampshire Agricultural 

 Experiment Station, Durham, N. H., 

 Editor for Horticulture. 



J. M. Greenman, Missouri Botanical Gar- 

 den, St. Louis, Mo., Editor for Taxon- 

 omy of Vascular Plants J 



Henry Kraemer, University of Michigan, 

 Ann Arbor, Mich., Editor for Pharma- 

 ceutical Botany and Pharmacognosy. 



E. W. Olive, Brooklyn Botanic Garden, 

 Brooklyn, N. Y., Editor for Morphology 

 and Taxonomy of Fungi, Bacteria and 

 Myxomycetes. 



C. V. Piper, U. S. Bureau of Plant Indus- 

 try, Washington, D. C, Editor for 

 Agronomy. 



Donald Reddick, Cornell University, Itha- 

 ca, N. Y., Editor for Pathology. 



J. R. Schramm, Cornell University, Ithaca > 

 N. Y., Editor for Morphology and Tax- 

 onomy oj Algae. 



George H. Shull, Princeton University , 

 Princeton, N. J., Editor for Genetics. 



E. W. Sinnott, Connecticut Agricultural 

 College, Storrs, Conn., Editor for Mor- 

 phology, Anatomy and Histology of Vas- 

 cular Plants. 



J. J. Skinner, U. S. Bureau of Plant In- 

 dustry, Washington, D. C, Editor for 

 Soil Science. 



Gilbert M. Smith, University of Wisconsin, 

 Madison, Wis., Editor for Cytology. 



Raphael Zon, U. S. Forest Service, Wash- 

 ington, D. C, Editor for Forest Botany 

 and Forestry. 



WILLIAMS & WILKINS COMPANY 



BALTIMORE, 17. S. A. 



THE CAMBRIDGE UNIVERSITY PRESS 



FETTER LANE, LONDON, E. C. 



Entered as second-class matter, November 9, 1918, at the post office at Baltimore, Maryland, under the Act o* 



March S. 1879 

 Copyright 1920, Williams & Wilkins Company 



-__ . ( $6.00 Domestic 



Price, net postpaid, for the two annual volumes < $6.25 Canada 



($6.50 Foreign 



Current Volumes: III and IV 



