NOVEMBER, 1915 
No. 9 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF A^/[ERICA 
CONTENTS 
Seasonal duration of ascospore expulsion of Endothia parasitica. 
F. D. Heald and R. A. Studhalter 429 
Dimorphism in Coniothyrium pirinum Sheldon. . . .... C. H. Crabill 449 
The genus Espeletia Paul C. Standley 468 
A study of the relation of transpiration to the size and ntmiber of stomata. 
Walter L, C. Muenscher 487 
IN COOPERATION WITH THE BOTANICAL SOQETY OF AMERICA 
BY THE 
BROOKLYN BOTANIC GARDEN 
At 41 North Queen Street, Lancaster, Pa 
Entered as ■ecoad'daM matter February ax, 29x4. at the post office at Lancaster, Pennsylnuila. 
under Uie of March 3. 
