Vol. XXXIV. No. CXXXIII. January, 1920. Price ij 
NNALS OF 
EDITED BY 
DUKINFIELD HENRY SCOTT, M.A., LL.D, D.Sc., F.R.S 
LATELY HONORARY KEEPER OF THE JO DR ELL LABORATORY, ROYAL BOTANIC GARDENS, KE 
ARMER, D.Sc., MA., F.R.S 
JOHN BRETLAND 
PROFESSOR OF BOTANY* IMPERIAL COLLEGE OF SCIENCE AND TECHNOLOGY, LONDON 
FRANCIS WALL OLIVER, M.A., D.Sc., F.R.S 
QUAIN PROFESSOR OF BOTANY, UNIVERSITY COLLEGE, LONDON 
ROLAND THAXTER, M.A., Ph.D 
. • PROFESSOR OF CRYPTOG AMIC BOTANY IN HARVARD UNIVERSITY, CAMBRIDGE, MASS., U.S.A. 
m 
ASSISTED BY OTHER BOTANISTS 
LONDON 
HUMPHREY MILFORD, OXFORD UNIVERSITY PRESS 
AMEN CORNER, E.C. 
Edinburgh, Glasgow, New York, Toronto 
Melbourne, Cape Town, and Bombay 
1920 
Printed in England at the Oxford University Press. 
