406 



XXIII. LEGUIVIINOSAE 



fire-protected area the evergreen species appeared to be spreading. Several 

 pyinkado, teak, and other moist forest species were found standing dead in 

 the evergreen near its edge. Many of these trees still had their bark on and 

 had evidently been choked for want of light. Farther in, dry stag- headed 

 trees and fallen trees of these species were occasionally met with. 



4. Indaing forest. This type of dry dipterocarp forest occm's on laterite 

 or gravel, among its most characteristic species being Dipterocarpus tiiber- 

 culatus, Pentacme suavis, Shorea obtusa, Melanorrhoea usitata, Buclw.iiania 

 latifolia, Dillenia pulcherrirna , and Diospyros hurmanica. Pyinkado is some- 

 times fairly plentiful in this type, but the trees are always stmited, and this 

 forest cannot be regarded as an important pyinkado-bearing type. 



5. Scrub forest of the dry zone. Pyinkado is not a typical tree of the 

 dry zone of Burma, but is met with to a very limited extent in the better 

 types of dry zone scrub forests on sandstone with alternating thin bands of 

 shale, though it attains only small dimensions ; its chief companions are 

 Pentacme suavis, Shorea obtusa, Terminalia tomentosa, T. Oliveri, Tectona 

 Hamiltoniana , Acacia Catechu, A. leucophloea, Cassia renigera, Buclmnania 

 latifolia, Odina Wodier, Diospyros burmajiicu, and Schleichera trijuga. 



Some figures may now be quoted showing the prevalence of pyinkado in 

 different forest tracts. The proportion of this species in the lower mixed 

 forests is comparatively small, the highest percentage recorded being 9-4 for 

 the Kangyi reserve of the Zigon forest division. Some of the plains forests, 

 however, owing to their accessibility, have been heavily worked in the past, 

 and figures regarding these forests may be misleading : thus the Satpok 

 reserve in Tharrawaddy, with only 3 per cent, of pyinkado, contains numerous 

 stumps of that species. The case of the upper mixed forests is different, for 

 working plan enumerations have been carried out over extensive areas where 

 pyinkado had not previously been worked, and the figures obtained indicate 

 that in many cases, particularly in the moister types of mixed forest, pyinkado 

 is more numerous than any other species, often approaching gregariousness. 

 The following instances may be quoted of sample plots specially rich in 

 pyinkado : 



Forest division. 



Pjdnmana . 

 Xyaunglebin 



Toungoo 

 Tharrawaddy 



^ Trees 1 ft. in diameter and over. 



Outside the Pegu Yoma the richest pyinkado tract hitherto examined is 

 the Nwa working circle of the Myittha forest division in the Chindwin drainage, 

 where enumerations showed an average for the whole tract of 490 pyinkado 

 trees 3 ft. and over in girth per 100 acres, this species forming no less than 

 24 per cent, of the total growing stock. 



