Botanical Abstracts 



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



field of botany in its broadesl sense. 



VOLUME IV 

 JULY, 1920 



PI BUSHED MONTHLY UNDER THE DIRECTION OF 



THE BOARD OF CONTROL OF BOTANICAL ABSTRACTS, Inc. 



BOARD OF EDITORS FOR 1920 

 AND ASSISTANT EDITORS 



Editor-in-Chief, Burton E. Livingston 



The Johns Hopkins University, Baltimore 



Associate, Lon A. Hawkins 



U. S. Bureau of Plant Industry, Washington, D. C. 



EDITORS FOR SECTIONS 



Agronomy. C. V. Pipeh, U. S. Bureau of Plant Indus- 

 try, Washington, D. C— Assistant Editor, Mary R. 

 Burr, U. S. Bureau of Plant Industry, Washington, 

 D.C. 



Bibliography, Biography, and History. Lincoln W, 

 Riddle, Harvard University, Cambridge, Massa- 

 chusetts. 



Botanical Education. C. Stuart Gager, Brooklyn 

 Botanic Garden, Brooklyn, New York. — Assistant 

 Editor, Alfred Gundf.rsen, Brooklyn Botanic 

 Garden, Brooklyn, New York. 



Cytology. Gilbert M. Smith, University of Wisconsin, 

 Madison, VVisconsin. — Assistant Editor, Geo. S. 

 Bryan, University of Wisconsin, Madison, Wisconsin. 



Ecology and Plant Geography. H. C. Cowles, The 

 University of Chicago, Chicago, Illinois. — Assistant 

 Editor, Geo. D. Fuller, The University of Chicago, 

 Chicago, Illinois. 



Forest Botany and Forestry. Raphael Zon, U. S. Forest 

 Service, Washington, D. C. — Assistant Editor, J. V. 

 Hofmann, U. S. Forest Service, Wind River Experi- 

 ment Station, Stabler, Washington. 



Genetics. George H. Shull, Princeton University, 

 Princeton, New Jersey. — Assistant Editor, J. P. 

 Kelly, Pennsylvania State College, State College, 

 Pennsylvania. 



Horticulture. J. H. Gourley, New Hampshire Agri- 

 cultural College, Durham, New Hampshire. 



Miscellaneous, Unclassified Publications. Burton E. 

 Livingston, The Johns Hopkins University, Balti- 

 more, Maryland. 



Morphology, Anatomy, and Histology of Vascular Plants. 

 E. W. Sinnott, Connecticut Agricultural College, 

 Storrs, Connecticut. 



Morphology and Taxonomy of Algae. E.N. Transeau, 

 Ohio State University, Columbus, Ohio. 



Morphology and Taxonomy of Bryophytes. Alexander 

 W. Evans, Yale University, New Haven, Connecticut. 



Morphology and Taxonomy of Fungi, Lichens, Bacteria, 

 and Myxomycetes. H. M. Fitzpatrick, Cornell 

 University, Ithaca, New York. 



Paleobotany and Evolutionary History. Edward W. 

 Berry, The Johns Hopkins University, Baltimore, 

 Maryland. 



Pathology. G. H. Coons, Michigan Agricultural Col- 

 lege, East Lansing, Michigan. — Assistant Editor, C. W. 

 Bennett, Michigan Agricultural College, East Lans- 

 ing, Michigan. 



Pharmaceutical Botany and Pharmacognosy. Heber 

 W. Youngken, Philadelphia College of Pharmacy 

 and Science, Philadelphia, Pennsylvania. — Assistant 

 Editor, E. N. Gathercoal, University of Illinois, 

 Urbana, Illinois. 



Physiology. B. M. Duggar, Missouri Botanical Garden, 

 St. Louis, Missouri. — Assistant Editor, Carroll W. 

 Dodge, Brown University, Providence, Rhode Island. 



Soil Science. J. J. Skinner, U. S. Bureau of Plant 

 Industry, Washington, D. C. — Assistant Editor, 

 F. M. Schertz, U. S. Bureau of Plant Industry, 

 Washington, D. C. 



Taxonomy of Vascular Plants. J. M. Greenman, Mis- 

 souri Botanical Garden, St. Louis, Missouri. — 

 Assistant Editor, E. B. Payson, Missouri Botanical 

 Garden, St. Louis, Missouri. 



H. O. BuCKMAN 



W. H. Chandler 

 A. J. Eames 



BIBLIOGRAPHY COMMITTEE FOR 1920 



J. R. Schramm, Chairman, Cornell University, Ithaca, New York 



R. A. Emerson 

 H. M. Fitzpatrick 

 R. Hosmer 



L. Knudson 



E. G. Montgomery 



D. Reddick 



L. W. Sharp 



K. M . WlEGAXD 



BALTIMORE, U. S. A. 



WILLIAMS & WILKINS COMPANY 

 1920 



