WATER PLANTS 



A STUDY OF AQUATIC ANGIOSPERMS 



BY 



AGNES ARBER, D.Sc., F.L.S. 



FELLOW OF NEWNHAM COLLEGE, CAMBRIDGE, 



AND KEDDEY FLETCHER-WARR STUDENT OF THE 



UNIVERSITY OF LONDON 



45781 



WITH A FRONTISPIECE AND 

 ONE HUNDRED AND SEVENTY-ONE TEXT-FIGURES 



CAMBRIDGE 



AT THE UNIVERSITY PRESS 

 1920 



451 W 



