V 



Notes on Dipterocarps. 



1. The Seedling" of Anisoptera costata, Korth 



By I. H. Buekill. 



Pig. 1. Flower seen from below, x 2\. 



It is proposed to clear the way for a general review of the 

 Malayan Dipteroc-arps by a series of short papers, of which this is 

 the first. It deals with the seedling of Anisoptera costata, Korthals. 



Anisoptera costata is a tall forest tree wild in the Botanic 

 Gardens, Singapore, where two individuals flowered freely at 

 the commencement of April, 1916, producing with new foliage, 

 panicles of pendent white flowers from the ends of the branches. 

 The shape of the flower is given above (fig. 1) : the corolla does 

 not fall. 



The seeds from this flowering ripened about the end of June : 

 and when they fell, a leaf-fall occurred, followed by a more abundant 

 production of new leaves than had been the case when the flowers 

 appeared. 



The seeds germinated at once, lying on the ground. In 

 germination the radicle is extruded, curves earthwards, and anchors 

 itself; then the cotyledons are pulled out of the capsule by the 

 straightening of the hypocotyl. The process is seen in progress in 

 Figs. 2 and 5 below. 



Jour. Straits Branch R. A. Soc, No. 75, 1917. 



