FAUNA AND FLCWA. T^ATBVni rFTrJJABVDI. 35 



vdorata ( '• Ton takieu''j of the same Natural Order. This lines the river 

 banks up to a considerable elevation, usually springing from the bank 

 at summer level, and is used by the Kariangs for making their 

 dug- out canoes. 



Of the Bipterocariiae or "Ton yo.ng" family, I only identi- 

 fied one (B. alatus), but I remember hearing the name lvi'V\|i£^Q'5 

 so probably D. iuherculatas also occurs. 



Large areas occur of the gregarious "Tonteng" and "'Ton 

 rang" (t'Shorea ohticsa and siantensis ) and from these areas have been 

 cut most of the sleepers for the Southern Railway. Growing on light 

 rock}' or stony soil, the ground beneath these trees is usually clear of 

 undergrowth, except short tufts of grass and a peculiar tree fern with 

 a trunk from 2-3 feet high. Notwithstanding annual jungle fi'-es, 

 these tree ferns burst into leaf, and a species of lily ilowers, im- 

 mediately after the first few rain^ at the end of April. 



Another noticeable tree is the Xi/lia clolahriformis which 



produces the [jj \j,f^^ and which, in common with some other 



jNIimosas, has a sweetly-scented flower in March, and a ))ig seed 

 pod, which is frequently heard in January and February suddenly 



bursting open witii a pistol-like report. 



*^ " 



In the same Natural ( )rdei" is another timber tree — the ^M 'i}^lf\ 



11 



( Plerorarpas iiidicus ), which I have found at elevations of S'JiJ-fOU 

 metres 



The Teak tree ( Teio/t<i (jra/idis) does not occui', in a natural 

 state, this side of Siam, south of 11'^" 20' N. Lat.. where ! found it 

 grt'garious ; but it is fre(|uentl\' ))lanted in the area under review, 

 noticeably at Potaram. 



At Khan Pah l.ai, K)uth-west of Petchabui'i, 1 found, a species 

 of true Pine {Fimts rj/crhnsh' ) at an elevation ot iUO metres, growing 

 on bare exposed ridges. This species is recorded by lirandis from the 

 Shan States of Burma and also from Sumatra. It is an unmistakable 

 ti'ee. being the only pine in which the leaves occur in clusters ot two ; 

 but the trees were stunted and poor — having a diameter of only one- 

 third that given b\' Rrandis. 



In these two classes of country ate found the great majority of 

 the mammals occurino- in this area. 



