NOTES ON DIPTEROCARPS. 291 
The lesson to which these observations seems to point, is that 
the embryo of Dipterocarps possesses a considerable amount of 
plasticity. 
This note closes with a few remarks upon the Malayan 
Dryobalanops known as “* Ioladan,” * a member of its genus which 
uses the wind in no way for the transport of its fruits. They are 
as here drawn, and in germination the wall is split along three lines 
Figure 18. A fruit of Koladan, showing an obliquity by no means 
uncommon, the placentar side being smaller than the other. Figure 19 
the same seen from the end showing which of the cracks usually it 
forced open the most: the placenta is uppermost. 
in ‘exactly the same way as in Dryobalanops aromatica. The 
embryo is further as in that species (vide No. 4, Jour. Straits 
Branch Roy. As. Soc., No. 81, 1920, p. 56) and so also is the young 
seedling. It was not remarked of that species; but may now be 
remarked after studing Koladan somewhat, that the seedling has a 
great tendency to force rupture along two lines and to come to the 
light by pushing aside a panel of the wall which is diametrically 
opposite to the placenta. 
Figure 20, A seedling of ‘‘Koladan’’ in the position in which is 
throws off its seedcoats and the fruit wall. 
Figure 21 shows the fruit wall in broken dotted lines imposed over 
an outline of a seedling in germination to indicate where the greatest 
pressure appears to occur. 
* Dryobalanops sp.—Koladan, Foxworthy in Malayan Science Bulletin, 
Ol OPT | psc 16. 
(Oy) 
-R <A. Soc., No. 86 1922. 
