NOTES ON DIPTEROCARPS. 



Figure 2. The embryo of Balanocarpus maximus seen from the outer 

 side; and figure 3 from the placentar side, \ nat. size. 



The surface of the cotyledons is very faintly lined by pressing 

 upon obscure ridges on the inner surface of the ovary wall. The 

 cotyledons are reddish: they contain starch with some oil. 



When the cotyledons have expanded, they are as in figures 

 4 and 5. The outer cotyledon now distinctly suggests the outer 

 cotyledon of Anisoptera costata, Korth., (see in this Journal, 1917,. 

 p. 44) ; but the placentar cotyledon is quite different. 



Figure 4. The outer cotyledon of Figure 5. The Placentar cotyle- 



Balanocarpus maximus from outside don of Balanocarpus maximus from 

 (above) and from inside (below), the side towards the outer cotyledon 

 ^ nat. size. (above) and from the other side 



(below). 



The seedling produces two pairs of leaves above the cotyledons, 

 which almost make a whorl. After that alternate leaves are 

 produced. 



The fruit of Balanocarpus maximus is not wind distributed 

 having no wings; but it floats, though the germinating embryo 

 sinks. It may be that the fruits gets distributed by being washed 

 short distances along the ground when rain is heavy. 



J our Straits Branch 



