THE 
NEW PHYTOLOGIST 
A BRITISH BOTANICAL JOURNAL, 
EDITED BY A. G. TANSLEY. M.A., F.R.S. 
UNIVERSITY LECTURER IN BOTANY, CAMBRIDGE. 
IN CONSULTATION WITH THE STAFF OF THE CAMBRIDGE BOTANY SCHOOL . 
VOLUME 
t 
XIX. 
M£|jg 
FEB 26 19 
3SDS S' J 
PP. VIII AND 278. 
WITH NUMEROUS FIGURES IN THE TEXT. 
WILLIAM WESLEY & SON, 
28 Essex Street, Strand, W.C.2. 
LONDON, 1920. 
