934 LEAFLETS or Paruprrse BoTANY ` [Vor. III, Arr. 52 
In it we find not only by far the greatest number of 
species, but also the greatest bulk of individuals as well as 
the greatest development in stature. Under such favorable 
ecological conditions enormous sizes are found. The bole of 
one tree of Q. pseudo-molucca Rim. measured seventy feet long, 
five feet in diameter, and appeared to be as round and straight 
as a lead-pencil. This species is by far the most abun- 
dant in these forests. Q. caudatifolia Merr. has been 
seen only once and collected on the Talon side of the range ex- 
tending from Apo to Santa Cruz on the Davao coast. In this 
same region were collected Q. apoensis Elm., Q. monticola King 
and Q. submonticola Elm. The last io species have 
exactly the same vegetative characters. Both of them 
had an abundance of ripe acorns which are as spe- 
cifically distinct from each other as Q. celebica Mig. 
is distinct from Q. mindanaensis Elm. At a lower eleva- 
tion, King’s species was more abundant. Q.  tasystachya 
Miq. was collected on a gentle forested slope on the 
Davao side of the Burebid mountains in the mount Apo 
to Santa Cruz range. Q. benettii Miq., Q. pruinosa Blm., 
Q. reflexa King and Q. minahassae Mig. were more or less fre- 
quently met scattered in humid forested flats. Here also belong 
the only two Castanopsis species in our district, C. javanica A. 
DC. grew to nearly equal dimensions as some of the larger 
oaks, and its needle-like spines of the fallen fruits are a men- 
ace to the bare-footed natives travelling through the forests. 
C. sumatrana A. DC. is less common than its brother species 
and extends to lower elevations or into the hill forests. 
This, the lower or hill forested belt, harbors fewer species, 
fewer individuals and smaller trees than the rainy forested 
belt. Q. cyrtorhyncha Mig. was the most common in this region. 
Q. celebica Blm. and Q. mindanaensis Elm. were standing side 
by side with mature fruit which alone is the salient dis- 
tinguishing character of the two species. The type of Q. 
mindanaensis Elm. is from Surigao, northeastern Mindanao. It 
is also reported from the Lake Lanao region, and Dr. Whitford 
collected it in the dipterocarp forests seventy-five feet above 
sea level at Port Banga, Zamboanga peninsula. Q. zschokkei 
Elm. is the rarest of all the species collected and As the send one 
discovered on sparsely wooded cliffs. 
