Vol.1 
MARCH, 1914 
No. 3 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMERICA 
CONTENTS 
Problems and Progress in Plant Pathology . L. R. Jones 97 
Some Observations on the Anatomy and Other Features of the "Black ICnot." 
Alban Stewart 112 
Cleavage in Didymium Melanospermum (Pers) MacBr. . : . . . R. A. Harper 127 
PUBLISHED 
IN COOPERATION WITH THE BOTANICAL SOCIETY OF AMERICA 
BY THE 
BROOKLYN BOTANIC GARDEN 
At 41 North Queen Street, Lancaster, Pa. 
Application made for entry as second class matter at the Post Office at Lancaster, Pa. 
