276 NOTES ON DIPTEROCARPS. 
low and level ground, and the fruits were stranded in lnes at the 
limit of the flooding. ‘The duration of the floating was tested and 
described in a note by one of us (Journ. Straits Branch Roy. As. 
Soe. 81, 1920, p. 75) where the wrong generic name Pachynocarpus 
was used for it. The average duration of floating in that experiment 
was found to be 22 days. 'The germination was described in the 
same place. The capsule is ruptured along three lines predeter- 
mined by weaknesses in the walls. These three lines are more 
clearly shown in the capsule of the related Vatica Zollingeriana, 
A. DiC., which is figured here, because it is instructive in regard to 
the nature of the less clearly marked lines of rupture in Vatica 
Wallichu. 
Fig. 7. Shell of the fruit of Vatica Zollingeriana, A.DC., in vertical 
section showing the sepals (s), and the wall cut on one side down one of 
the lines of rupture, and on the other through the thick swollen mid-part 
between. Doubtless V. Zollingeriana is water-distributed, for the swollen 
part is such as would keep it floating. 
The fruiting calyx of V, Wallichw is developed to a somewhat 
variable extent: sometimes it is humped as in the first figure above; 
sometimes it is rather flat, as in the second. ‘The two figures were 
from fruits picked from the ground of the Tasek Gelugor Forest 
Reserve at the same spot, and “appeared to be the product of a tree 
ummediately above them. 
Our material of Vatica Wallichu is as follows :— 
Province WELLESLEY. In the Tasek Gelugor Forest Reserve, with 
fruit, in September 1921, Burkill 6599! 
PENANG. Without precise locality, Wallich Cat. 9018! 
Perak. Ulu Sapetang, with young fruit in Feb. 1909, MW, Hashim 
228!; Larut, within 100 “ft. of sea level in dense jungle, 
with young fruit in January 1884, King’s Collector 
5423!; on low hills, with fruit in February. 1884, King’s 
Collector 5546!; Briah upon the Larut plain, with young 
fruit in December 1892, Wray 4223!/; banks of the Ber- 
nam river at 300-400 ft., with young fruit, in April 1886, 
King’s Collector 8857! 
Pawanc. Temerloh, with fruit in November 1921, Awang Lela 
5470!; Kuantan in the Baloh Forest Reserve, with fruit 
in March 1920, Yeob 873!; Kelebor near Kuala Rompin, 
with fruit in April 1921, Bidin 4182! 
SELANGOR. Kelamber Forest Reserve near Klang, in swamp with 
fruit in September 1919, Hamid and Yeob, 3295! 
Matacca. Without locality, in flower and with young fruit, Main- 
gay 201!; Sungei Udang, with fruit in Tuly, 1894, Good- 
enough 1 1968! 
Jour. Straits Branch 
