Vol. XXV. No. XCVIII. April, 1911. Price 14s. 
Annals of Botany 
EDITED BY 
ISAAC BAYLEY BALFOUR, M.A., M.D., F.R.S. 
KING’S BOTANIST IN SCOTLAND, PROFESSOR OF BOTANY IN THE UNIVERSITY 
AND KEEPER OF THE ROYAL BOTANIC GARDEN, EDINBURGH 
DUKINFIELD HENRY SCOTT, M.A., LL.D, F.R.S., P.L.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 
A N p 
ROLAND THAXTER, M.A., Ph.D. 
PROFESSOR OF CRYPTOGAMIC BOTANY IN HARVARD UNIVERSITY, CAMBRIDGE, MASS., U.S.A. 
ASSISTED BY OTHER BOTANISTS 
London 
HENRY FROWDE, AMEN CORNER, E.C. 
Oyfovl) 
CLARENDON PRESS DEPOSITORY, 116 HIGH STREET 
I 9 I I 
Printed by Horace Hart, at the Clarendon Press, Oxford 
