278 NOTES ON DIPTEROCARPS. 
the characteristic fruits it 1s impossible to make sure of this: it 
was collected in 1894: in 1892 Mr. Ridley got the species on Bukit 
Mandai (No. 8943) and also at Changi (Nos. 4447! and 4448!), 
since which dates clearing has been extensive; and the tree has 
not been recognised in recent years outside the Botanic Gardens. 
In the Gardens there are several individuals. The tallest is in 
area N, tree No. 795: the second tree No. 815 in area V, and 
others are in area U and V. It is not a tree of lowlying ground; 
and its large fruits sink at once in water. Such distribution as 
they get must be by being rolled along the floor of the forest or 
(and this is the usual distribution of many forest trees of the 
second rank) by transport through small distances by animals 
seeking food. 
Tree No, 795 in the Botanic Gardens is about 100 feet high. 
Its trunk is 62 in. in circumference at breast height: the bark is 
medium grey. The spread of the branches is about 30 feet from 
the trunk, the lower 60: feet of which are straight smooth and 
branchless. 
The flower drawn above was produced by tree 815 in January 
1921; and fruits were not ripe until the following November. 
They fell very deliberately through three months or more. 
Fig. 8. A half ripe fruit of Vatica moluccana, Burck, showing the 
development of the reflexed calyx. The fruit is figured to illustrate a 
stage in the series of species connecting Vatica Wallichii with Vaticas of 
the section Retinodendron. 
The fruit.of Vatica Ridleyana, if elongated, is always turned 
to one side:as drawn; but tree No. 815 produces longer fruits by 
34 in, than tree No. 795, in which the apex is nearly straight. The 
leaves have glandular patches just as those of Vatica Wallichu. 
These glands are slightly concave, and carry brown hairs. 
The spongy parenchyma of the lower surface of the leaf gives 
place over their area to something denser. No excretion has been 
observed to occur on them; but probably there is one. 
Pachynocarpus umbonatus, by the view taken here, is the tree 
of Borneo sent by Barber to Sir William Hooker at Kew,—cer- 
tainly the fruiting part of the specimens, but not quite so certainly 
the flowering part. These flowering branches show thinner leaves 
with less prominent veins than any peninsular specimen which 
we ascribe to the genus. And as leaves so thin seem to be within 
the range of variation of the leaves of Vatica Wallichw; and as - 
Jour. Straits Branch 
