Vol. XXVII. No. CVI. April, 1913. Price 14s. 
Annals of Botany 
EDITED BY 
DUKINFIELD HENRY SCOTT, M.A., LL.D., D.Sc., For. Sec. R.S. 
LATELY HONORARY KEEPER OF THE JODRELL LABORATORY, ROYAL BOTANIC GARDENS, KEW 
JOHN BRETLAND 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 CRYPTOGAMIC BOTANY IN HARVARD UNIVERSITY, CAMBRIDGE, MASS., U.S.A. 
ASSISTED BY OTHER BOTANISTS 
• • • ; ' ; 
'/£. ' V 
!$&•*! Vi * . ' ( MAY 16 1913 ■ 7 
1 \ 4 '.. ' / 1 
MuS S>^' 
LONDON 
HUMPHREY MILFORD, OXFORD UNIVERSITY PRESS 
AMEN CORNER, E.C. 
Edinburgh, Glasgow, New York, Toronto, Melbourne, and Bombay 
1913 
Printed, by Horace Hart, at the Clarendon Press, Oxford 
