Vol. VII 
DECEMBER, 1920 
No. 10 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMERICA 
CONTENTS 
The modification of vegetative and reproductive functions under some varying 
conditions of metabolism E. J. Kraus 409 
The cambium audits derivative tissues. I II. A reconnaissance of cytological 
phenomena in the cambium . . . . . . . . ... , . . I. W. Bailey 417 
Morphology and life history of some Asconrycetes with special reference to the 
presence and function of spermatid. B. B. Higgins 435 
Biology, morphology, and cytoplasmic structure of Aleurodiscus 
Harry E. Stork 445 
The germination of the spores of Conocephalum conlcum . . Sister M. Ellen 458 
Index to Volume VII 465 
PUBLISHED 
IN COOPERATION WitH THE BOTANICAL SOCIETY OF AMERICA 
At 41 North Queen Street, Lancaster, Pa, 
BY THE 
BROOKLYN BOTANIC GARDEN 
Brooklyn, N. Y. 
Entered as accqnd-clatt matter February 31, 1914, at the post office at Lancaster, PennajrlTaaia. 
utider the act of March 3, ZS79 
