PREFACE. 
IX 
Marshall Ward, and Bayley Balfour, Sir William Thiselton- 
Dyer, and Messrs Francis Darwin and I. H. Burkill, besides 
Messrs Lang, Seward, Tansley, Lynch, Church, Moore, 
Dewar and others. Since it appeared, I have received 
many valuable suggestions from the above and other friends, 
notably Drs Augustine Henry and A. J. Chalmers, Pro- 
fessors G. L. Goodale and J. B. Farmer, and Mr R. H. Lock. 
As with the former edition, so in this, I am indebted to 
Mr A. E. Shipley for his kind cooperation in many ways. 
JOHN C. WILLIS. 
Royal Botanic Gardens, 
Peradeniya, Ceylon, 
November 17 th , 1903. 
