V.ol. XXXII. No. CXXVII. July, 19x8. Price 14s. 
Annals of Botany 
EDITED BY 
DUKINFIELD HENRY SCOTT, M.A., LL.D, D.Sc., F.R.S. 
LATELy HONORARY KEEPER OF THE JODRELL LABORATORY, ROVAL BOTANIC GARDENS, KEW 
JOHN RRETLAND FARMER, D.Sc., M.A., F.R.S. 
PROFESSOR "OF BOTANY, ROYAL COLLEGE OF SCIENCE, LONDON 
FRANCIS WALL OLIVER, M.A., D.Sc., F.R.S. 
QUAIN PROFESSOR OF BOTANY, UNIVERSITY COLLEGE, LONDON 
AND 
ROLAND THAXTER, M.A., Ph.D. 
. PROFESSOR OF CRVPTOGAMIC BOTANY IN HARVARD UNIVERSITY, CAMBRIDGE, MASS., U.S.A. 
HUMPHREY MILFORD, OXFORD UNIVERSITY PRESS 
AMEN CORNER, E.C. 
Edinburgh, Glasgow, New York, Toronto, 
Melbourne, Cape Town, and Bombay 
19x8 
Printed in England at the Oxford University Press 
