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 
VOLUME XXVII 
With Fifty-nine Plates and Two Hundred and Eighty-one 
Figures in the Text 
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LONDON 
HUMHPREY MILFORD, OXFORD UNIVERSITY PRESS 
AMEN CORNER, E.C. 
Edinburgh, Glasgow, New York, Toronto, Melbourne and Bombay 
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