308 



shops at the price of about 6 seeds for a cent. The tree occurs in 

 Burmah, down the Malay Peninsula to Sumatra and is not uncom- 

 mon in Malacca and Singapore. 



SWAMP GROWTH IN THE TANJONG BURONG 

 BAKAU RESERVE, DINDINGS. 



It might be interesting to note the process of elimination that 

 goes on at Tanjong Burong, as it will to some extent throw light 

 on the struggle for existence that is carried on upon recent allu- 

 vial deposits. 



On the Kwala Bruas a thicket stage of Api-Api meets the eye in 

 successive age classes for a little over a mile, when Lengadie is 

 first seen in like gradations marking the introduction of the species 

 and the elimination of Api-Api and Brembong, which yield a 

 smoky fuel and having a crooked bole are difficult to split. 



The sandbanks down the river are gradually sown up by Api- 

 Api from bird-droppings and these when grown up, fertilize the 

 soil paving the way for the entrance of Lengadie and Bakau. 

 When the soil has attained this stage oi fertility, Api-Api does 

 not seem to put forth any energy to hold its own as the condi- 

 tions for growth are even in the struggle for existence. The 

 seedlings now have not the same vitality as that which produced 

 the parent trees from bird-droppings and the species being low 

 crowned does not grow quite close together so as to provide for 

 a struggle in the root-systems of intruding species, whereas Leng- 

 adie has a tendency to form a pure dense gregarious forest and 

 in the course of a revolution completely chokes out Api-Api. It 

 is also a shade bearer and in the thicket stage has dense spread- 

 ing crowns; it seeds profusely and gradually encroaches into the 

 Api-Api at spring tides and there establishes itself while the birds 

 prefer the sandy banks where they can feed on worms and no 

 longer have any attractions to enter on the sown up tracts. 



The growth of Api-Api on newly formed banks is advanta- 

 geous; when it has done its work of settling the deposit it gives 

 way to the Lengadie and Bakau which are so much used as fuel. 



V: P. BORGES. 



A LEAF -FUNGUS ON HEVEA BRAZILIENSIS. 



I have received from Mr. COATES of Seremban some leaves of 

 ihe Para Rubber tree, infected with a leaf- fungus, the first I have 

 seen from the Malay Peninsula. The leaves are all deformed, being 

 curiously narrowed, with the nerves very irregular, wavy and ascend- 

 ing towards the tip. In some cases running parallel to the mid-rib 

 for a short way. They are also very incequilateral, one hide of the 

 leaf being much narrower than the other. Scattered over the leaf 

 are pale whitish orange patehes of dead tissue. These are h to | of 



