436 The Philippine Journal of Science 1914 
The local development of a series of forms, which has taken 
place in the two genera just mentioned, has taken place also 
in the large genus Asplenium, apparently from a number of 
immigrant ancestral forms, and with the result that the derived 
groups have developed until they overlap, and the differentia- 
tion of groups, and the assignment of species and forms to the 
different groups, is only possible to a person who has something 
like the complete knowledge of the flora which Doctor Hille- 
brand possessed. 
In both Asplenium and Sadleria, I have ventured to describe 
new species, and in Asplenium I have raised some of his forms 
to specific rank. The most of the species which I describe 
as new in this paper are, I believe, plants which Doctor Hille- 
brand had not seen. It must be remarked that the Abbe Faurie 
is himself a collector of very long experience, that he is a good 
student of ferns, and that he devoted himself for about a 
year and a half wholly to the collection of the Hawaiian plants. 
Even in a land where the ferns have been as well studied as in 
Hawaii, it would be very strange if the Abbe Faurie had not 
succeeded in finding a number of previously unknown plants. 
In fact, knowing as I do the work of Abbe Faurie, I consider 
the small number of new species which I can find in this collec- 
tion almost as strong a testimonial as is Hillebrand’s own work 
to the thoroughness with which Doctor Hillebrand has covered 
his field. Almost all of the species described by Doctor Hille- 
brand, and a wide range of forms which are not treated as 
species, are found in the Faurie collection. 
It was once raised as an objection to systematic botanical 
work even on the Philippine flora, and has since been raised 
against work with plants coming from without the Philippines, 
that the opportunities for careful work of this kind in a place 
as remote as the Philippine Islands are hardly sufficient to 
justify the dangers which must result from hasty publication 
or publication without proper facilities. For the work with 
these Hawaiian ferns, I have had available, in the library of 
the Bureau of Science, every publication which I have known 
I would like to consult with the exception of the volume on ferns 
by Brackenridge in the report of the United States Exploring 
Expedition. I have previously consulted the Brackenridge vol- 
ume, in the library of the Bishop Museum in Honolulu, and 
have made some notes from it, but would be very glad to have 
had continued access to this work. Hawaiian ferns are rep- 
resented in very considerable number in the herbarium of the 
