in the Islands, there still remain a few as yet unidentified ; among 
them are a few species of the genus Ficus, which possesses six hun- 
dred species in all. Undoubtedly there are still a few odd trees in 
some out of the way locality to be heard from, and the writer hopes 
that this volume will stimulate the interest in the search for such. 
He would welcome a correspondence with anyone residing in this 
Territory who has a tree or trees not treated in this book, and would 
welcome the receipt of flowering and fruiting specimens for identi- 
fication, with any facts known regarding the history of introduction. 
The information given under each tree or shrub has been obtained 
from reliable works, the most noteworthy being "Watt's Dictionary 
of the Economic Products of India." 
During his travels through India and Ceylon and other parts of 
the world, the writer himself has gathered facts regarding the useful 
qualities of some of the trees cultivated in Hawaii. In only a few 
instances was it possible to give historic data, as time of introduction 
and name of introducer. Such knowledge is scarce, and often not 
reliable. 
The photographs illustrating this volume are original, and have 
been taken by the author save in one instance, plate XXVIII, which 
was taken by Mr. W. M. Giffard. It has now become the writer's 
property through gift. 
The writer's sincere thanks are due to the patrons whose gener- 
ous support made this publication possible. He is especially grateful 
to Doctors A. Romberg and A. L. Andrews of the College of Hawaii 
for the reading of manuscript and proof sheets. 
The volume is herewith presented to the public with the hope 
that it will fulfill the purpose for which it was intended and arouse 
enthusiasm among the kamaainas for the protection of these trees 
entrusted into their care. Let them plant new generations of some 
of the single and odd specimens introduced by their forefathers, that 
they may not share the fate of some of our native trees. 
Honolulu, October 13, 1916. 
