Notes on Dipterocarps. 



No. 2, The Seedling" and the Seed- production in some 

 species of Shorea. 



By I. H. Burkill. 



Fruit of Shorea leprosula, slightly reduced : and the dehisced capsule 



showing the sterilised loculi forming a partial septum intruding 



into the fertile loculus. 



The ovary of Shorea has three loculi, and in each loculus are 

 two ovules. But of the six thus presented in each flower, usually 

 one only matures into a seed. As this one grows, it with its loculus 

 extends round the central placentas, ending in wrapping within 

 itself the two sterilised loculi. At seed-fall all endosperm has gone, 

 and it is the fleshy inner cotyledon which does this wrapping. The 

 radicle of the embryo is directed towards the apex of the loculus. 

 Figure 2 is the embryo of Shorea leprosula, Miq., seen ' from the 

 basal end of the loculus, showing how the two cotjdedons lie 

 doubled round the placentas (pi.) one being outside the other. 



The figures here reproduced have all been drawn with the aid of a camera, 

 and are proportionately accurate. 



Jour. Straits Branch R. A. Soc, No. 76, 1917. 



