Annals of Botany 
ft* 
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 
D. H. SCOTT, M.A., Ph.D., F.R.S. 
HONORARY KEEPER OF THE JODRELL LABORATORY, ROYAL BOTANIC GARDENS, KEW 
AND 
WILLIAM GILSON FARLOW, M.D. 
PROFESSOR OF CRYPTOGAMIC BOTANY IN HARVARD UNIVERSITY, CAMBRIDGE, MASS., U.S.A. 
ASSISTED BY OTHER BOTANISTS 
% 
VOLUME XVIII 
With Forty-one Plates and Sixty-one Figures in the Text 
Bon&on 
HENRY FROWDE, M.A., AMEN CORNER, E.C. 
OXFORD: CLARENDON PRESS DEPOSITORY, 116 HIGH STREET 
TQ04 
