190 
ROBINSON. 
Much of the apparent peculiarity in the distribution of the Polillo 
species is undoubtedly due to the paucity of collections from certain 
localities. Thus, it is to be expected that the 8 that are known from 
Polillo and Mindanao only, will all turn up in Samar, at present almost 
unknown botanically. Again, in the above summary, no reference is 
made to extra-Philippine distribution, and several species included, not 
yet collected in Mindanao, have a wide Malayan distribution. 
In the following enumeration of species, the Orchidaceae have been 
identified by Mr. Oakes Ames, North Easton, Mass., the Piperaceae by 
M. C. de Candolle, Geneve, Switzerland, the Sapindaceae by Prof. Dr. 
L. Eadlkofer, Munchen, Bavaria, the Dipierocarpaceae and Rhizopiio- 
raceae by Dr. F. W. Foxworthy, and the Gramineae by Mr. E. D. Merrill, 
who has also assisted me in various cases in different families. 
HEPATICAE. 
Determinations of the collections have been received from Dr. F. Stephani, 
but the list is not here given, as the new species and those known from previous 
collections but still undescribed form half of the total. They throw considerable 
light on the flora of the Islands as a whole, and are therefore summarized in 
contrast to those obtained on the opposite coast of Infanta in a very much 
shorter space of time. However, the bulk of the Infanta collections came from 
the summit or at least from mossy forest on Mount Binuang. Were only those 
of low levels to be contrasted, Polillo would make much the better comparative 
showing. 
Infanta. 
Polillo. 
Common 
to both. 
Total. 
New species..' 
7 
8 
1 
14 
New to the Philippines . 
14 
17 
3 
28 
Previously known from the Philippines. 
8 
3 
2 
9 
Total . . .. . .. 
29 
28 
6 51 
Binuang is the most northern mountain on the east coast from which col- 
lections have been obtained. Collections in such groups have been too scattered 
and made in too haphazard a fashion to warrant any sharp conclusions, but it 
may fairly be claimed that the hepatics of the east coast likely to catch the 
eye of one not especially interested in them, must differ considerably from those 
of either the mountain region of northern Luzon or of the more frequently visited 
mountains such as Mariveles and Banajao. The figures are open to the quali- 
fications that there may be in European herbaria material collected by Semper, 
Micholitz, or others, concerning which no information is available here, that 
two of the species counted from Infanta a,s new to the Philippines have since 
been obtained, one on Canlaon Volcano, in Negros, the other on Mount Banajao, 
and that one indeterminable number from Polillo is omitted. 
The Polillo genera are Archilejeunea, Cololejeunea, Eulejeunea, Frullania, 
Hygrolejeunea, Leptolejeunea, Lophocolea, Mastigobryum, Mastigolejeunea, Pla- 
giochila, Pycnolejeunea, Radula, and Thysancmthus, all, previously known from 
the Philippines. Infanta adds Saccogyna to the Philippine list, its other genera 
