You XIII, Sec. C, No. 3 
May, 1918 
THE PHILIPPINE 
JOURNAL OF SCIENCE 
ALVIN J. COX, M. A., Ph. D. 
GENERAL EDITOR 
Section C. Botany 
E. D. MERRILL, M. S. 
EDITOR 
WITH THE COOPERATION OP 
W. H. BROWN, Ph. D.; C. P. BAKER, M. A. 
L. M. GUERRERO, Phar. D.; R. C. McGREGOR, A. B. 
MANILA 
BUREAU OF PRINTING 
1918 
