[20] 
DECEMBER 29, 1911] A FascicLE OF SiBUYAN Fies 1311 
forested clear up to 5000 feet altitude, the upper forests becom- 
ing low stocky trees. Along this ridge I was obliged to cut 
my own trail to nearly the uppermost apparently insurmountable 
central summit mass. I believe by making a camp at 4500 feet, 
a small mountaineering party can make it to the summit. Pos- 
sibly a little reconnoitering will be necessary before a passable 
course can be found. All water for camping purposes must 
be taken along from the valley. My exploration work was there- 
fore confined to the lower region, chiefly along the two already 
mentioned rivers. 'The vegetation along these rivers proved 
exceedingly interesting to me, because of its diversity. The 
Pauala river proved by far the more interesting and novel. This 
is mainly dueto part of the summit vegetation having been washed 
down and disseminated as botanical floats along its course. Such 
evident examples are Vaccinium gitingensis Elm., Nepenthes 
sibuyanensis Elm. and Decaspermun grandiflora Elm. Along 
this same river were found quantities of Xanthostemon verdugo- 
nianus Naves and which was never seen along the Patoo river. 
The fig flora of Sibuyan is poor and disappointing. Likewise 
the ferns, orchids, mosses and palms. Yet otherwise I am 
surprised at its novel character, many groups run over fifty per 
cent new, and the writer is certain that there are still remaining 
many unknown species in the unexplored dense stocky forest 
region above 5000 feet elevation. 
The study of my collection brought out very strongly 
the close relationship of the Sibuyan flora to that of 
the flora on the east coast of Luzon along the Pacific 
ocean, especially from Atimonan to Casiguran of Tayabas 
province. : 
Key to the sections. 
A. Pseudo-hermaphrodite; male flowers with one stamen 
and a rudimentary pistil. Pseudo-hermaphrodite flo- 
wers and gall flowers in one set of receptacles; fertile 
female flowers in another set. 
1. Palaeomorphe. 
AA. Unisexual or asexual; male flowers without rudi- 
mentary pistils. 
