76 



NOTES ON DIPTEROCARPS. 



the cotyledons pushing out a stout plantlet, which rather slowly 

 produced its first foliage leaves. The cotyledons do not escape 

 from the seed : for the purpose of drawing them they were freed as in 

 figure 209 : they are thick and approximately equal, dull yellow in 

 •colour, packed with starch, and without chlorophyll. The seedling 

 ■does not look like that of a Dipterocarp. The fruit dehisces along 

 three well defined lines obviously connected with the tri-locular 

 nature of the ovary. The placenta leaves but a shallow impression 

 •down the placentar cotyledon. 



Figure 206, the flower of Pachy- 

 nocarpus Wallichii from the side ; 

 figure 207, the same in section. 



Figure 208, the germinating 

 lruit of Pachynocarpus Wallichii, the 

 radicle just extruded. 



Fgure 209, a? seedling of Pachynocarpus Wallichii, the fruit wall has beon 

 removed, on doing which the cotyledons part a little inconsequene of stresses in 

 their petioles, \ nat. size ; figure 210, the embryo of Pachynocarpus Wallichii with 

 the radicle away from the observer ; figure 211, the cotyledon which is the outer 

 in Dipt erocarpus from the outside ; figure 212, the placentar cotyledon with the 

 side away from the other cotvledon toward the observer. 



Jour. Straits Branch 



