CONTENTS. 



Agronoiu}' 577-647 



Bibliography, Biography and History 648-671 



Botanical Education 672-682 



Cytology 683-701 



Forest Botany and Forestry 702-728 



Genetics 729-778 



Horticulture 779-863 



Morphology, Anatomy and Histology of Vascular Plants 864-874 



Morphology and Taxonomy of Bryophytes 875-879 



Morphology and Taxonomy of Fungi, Lichens, Bacteria and Myxomyoetes 880-887 



Paleobotany and Evolutionary History 888-893 



Pathology S94-965 



Pharmaceutical Botany and Pharmacognosy 966-995 



Physiology 996-1045 



Soil Science 1046-1072 



Taxonomy of Va scular Plants 1073-1098 



Miscellaneous, Unclassified Publications 1099-1100 



BOARD OF EDITORS FOR 1921 

 AND ASSISTANT EDITORS 



Editor-in-Chief, J. R. SCHEAMM 

 Cornell University, Ithaca, New York 



EDITORS FOR SECTIONS 



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

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

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

 D. C. 



Bibliography, Biography and History. Neil E. Stevens, 

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



Botanical Education. C Stuart Gager, Brooklyn 

 Botanic Garden, Brooklyn, New York.— Assistant 

 Editor, Alfred Gundersen, Brooklyn Botanic 

 Garden, Brooklyn, New York. 



Cytology. Gilbert M. Smith, University of Wisconsin, 

 Madison, Wisconsin. — 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 Ex- 

 periment 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, Ohio .Agricultural Ex- 

 periment Station, Wooster, Ohio. — Assistant Editor, 

 H. E. Knowlton, West Virginia University, Morgan- 

 town, West Virginia. 



Miscellaneous, Unclassified Publications. Burton E. 

 Livingston, The Johns Hopkins University, Balti- 

 more, Maryland.— Assistant Editor, Sam F._ Tre- 

 lease. The Johns Hopkins University, Baltimore, 

 Maryland. 



Morphology, Anatomy and Histology of Vascular Plants 

 E. W. Sinnott, Connecticut Agricultural College 

 Storrs, Connecticut. 



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

 Ohio State University, Columbus, Ohio. 



Morphology and Taxonomy of Bryophytes. Alexandbb 

 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, 701 South Wood St., Chicago, 

 Illinois. 



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

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

 Dodge, Harvard University, Cambridge, Massachu- 

 setts. 



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, Wash- 

 ington, D. C. 



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

 souri Botanical Garden, St. Louis, Missouri. — 

 Assistant Editor, E. B. Payson, University of 

 Wyoming, Laramie, Wyoming. 



BIBLIOGRAPHY COMMITTEE FOR 1921 



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



H. O. BUCKMAN R. HOSMER 



W. H. Chandler L. Knudson 



A.J. Eamgs D. Reddick 



R.A.Emerson L.W.Sharp 



H. M. FrrzPATRiCK K. M.Wieqand 



R. S. HARirts, Secretary 



