704 XLVI. VERBENACEAE 



teak it contains, is that the trees are mainly of large dimensions, the proportion 

 of small trees being very deficient ; natural reproduction is almost entirely 

 wanting until special measures, which are described later, are taken to stimulate 

 it. Bamboos are absent over much of the area ; the chief companions of the 

 teak are Gmelina arborea, Anogeissus acuminata, and Careya arborea. Although 

 the teak trees attain large size the timber is not of the best quality, Toeing 

 much riddled by the bee-hole borer {Duomitus ceramicu-s, Wlk.). 



In some localities, notably in the Ruby Mines district, teak occurs in belts 

 or pockets which follow the courses of streams, large stretches of intervening 

 country being covered with induing or other types of forest devoid of teak. 

 The teak confines itself to the alluvial flats or other fertile ground in the 

 neighbourhood of the watercourses. Throughout Burma, in forest both of 

 the upper and of the lower mixed types, teak is very commonly found, some- 

 times in gregarious form, on well-drained alluvial flats of varying size, on the 

 fertile loam of which it may attain large dimensions. Bamboos are often 

 absent in such places, or if they are present the commonest species is Bambusa 

 Tulda. Teak is sometimes found in indaing forest on laterite, but in this type 

 it is invariably stunted. 



As a general rule teak forms a comparatively small proportion of the 

 gro^ving stock in the forests of Burma, the trees being scattered singly or in 

 groups among a large number of other species. Some years ago I made an 

 examination of the numerous statistics contained in the various working plans 

 which have been compiled for the teak forests, and published the results.^ 

 The figures yielded including those furnished by the Mosit reserve in Bhamo, 

 the working plan of which has been issued since show that over the teak- 

 bearing area of whole forests, that is, whole working circles and not selected 

 areas rich in teak, the average number of teak trees 6 ft. or over in girth per 

 100 acres is 100 or more in respect of fourteen forests hitherto enumerated, 

 aggregating 972 square miles of teak-bearing forest ; of these the Mohnyin 

 forest heads the list with 241 such trees per 100 acres. Only four of these 

 forests have 100 or more teak trees 7 ft. in girth and over per 100 acres. 



Considering next those forests which are rich in sound teak trees 3 ft. and 

 over in girth, it is interesting to note that the three richest forests are situated 

 on flat alluvial ground. The three forests in question are : 



1. Mohnyin (Katha division), 707 trees per 100 acres. 



2. Satpok (Tharrawaddy division), 455 trees per 100 acres. 



3. Kangyi (Zigon division), 441 trees per 100 acres. 



Satpok and Kangyi are typical lower mixed forests. Next in order of 

 richness come two typical upper mixed forests of the Pegu Yoma, namely 

 Bondaung (Toungoo) with 409 trees, and Kadinbilin (Tharrawaddy) \\ith 

 408 trees. No fewer than nine forests have totals of between 300 and 400 

 sound teak trees 3 ft. and over in girth per 100 acres, and of these all but one 

 are situated in the Pegu Yoma. 



As regards the percentage of teak in the total growing stock in teak- 

 bearing forest, in the twelve richest forests in which enumerations of all species 

 have been carried out, the percentage of sound teak trees 3 ft. in girth and 



' A Note on some Statistical and other Information regarding the Teak Forests of Burma. 

 Ind. For. Records, vol. iii, yt. i, 1911. 



