218 The Philippine Journal of Science isu 
Archipelago. In view of the supposed reason for the distinc- 
tion of the two floras, this is a point of some importance. Before 
a final opinion can be formed, it will be necessary to have fairly 
full collections from critical districts, such as the Angat country 
in Bulacan and Mount Maquiling in Laguna: the latter are 
being obtained. 
A side result suggested but not fully stated in the above table 
is that the number of endemic species in the Mountain Province 
is nearly twice that of the rest of Luzon taken together; for 
the number credited to the latter consists of the 21 in the first 
column of the table, 6 others from Rizal and Cagayan, and a 
single species endemic in two adjoining localities on the eastern 
slope. This disproportion may not prove permanent. 
It has been seen that the study of moss distribution gives the 
same result on all main points of inquiry as had already been 
held for flowering plants; but that it only partly agrees with 
those obtained for the ferns. So many weeds and other undoubt- 
edly introduced species have had to be enumerated among the 
flowering plants that their apparent percentage of endemism 
has been materially lowered; so that among so-called native 
species the mosses really have a slightly greater tendency to 
extend to other regions. But as all species are taken as origi- 
nating at a single point, this practically amounts to saying, that 
in the Philippines, natural and artificial introduction, taken to- 
gether, have brought about practically identical results in the 
case of the groups here contrasted. Probably also the average 
range of the moss species is greater than that of the phanerogams, 
but the question hardly permits more than vague opinion. 
