( iii ) 



In order to indicate the frequency or otherwise with which trees are met with, I have 

 adopted only 5 degrees, using the numericals 1 to 5 in the form of exponents. They are 



1. Very rare, if the tree has been met with only in a few, or in single, individuals. 



2. Rare, if the tree is of a dispersed and sporadic occurrence, although found at least 

 in 5 or 6 localities. 



3. Frequently, if the tree occurs generally but only in few individuals. 



4. Common, if the tree is generally distributed, but not forming a prevalent con- 

 stituent of forests. 



5. Very common, if the tree occurs in large quantities, thus forming a conspicuous 

 part of the forests. 



The concluding numerals, divided by, or preceded by /. (up to) indicates the hypso- 

 metrical range. Sometimes when the upper or lower limits are uuknown, they are indicated 

 by z. (ascending to) or V (descending to). This concludes the formulae of distribution. 



The next information refers to the soil-question. It is always headed by SS. meaning 

 Substratum or soil. A very great number of trees grow on all formations, but on some better 

 than on others. To express this I have adopted the mathematical sign of infinity an inverted 

 8, oo , but at the same time added the substratum which the tree prefers or ou which it 

 appears to grow best. Such favourable substrata are indicated by italics. All saline soils are, 

 however, excluded, and it is only where the abbreviation for saline strata is specially added 

 that we may expect to find a tree growing also on saline grounds. Thus oo , Ca. S., means 

 on all formations, but growing best on calcareous compact sand-stone, but never on saline 

 grounds. 



The following abbreviations for subsoils and substrata only convey fragmentary infor- 

 mation. It is hardly necessary to remark here that the results arrived at by me, may here- 

 after prove to be subject to numerous modifications aud even corrections. 



Sal. = Saline, whether alluvial or rocky. 



All. = Alluvium. 



Dil. = Diluvium, including all diluvial deposits without special distinction such as 

 laterite, gravel, stiff diluvial clays, etc. 



Lat. = Laterite of a vitrified cavernous nature, thus bemg impermeable. 



Lat. p. = Laterite of a more permeable nature, like that of the Southern slopes of the 

 Pegu Yomah, and of many Malay islands. 



Aren. = Arenaceous, including all the pebbly and gravelly soils, if the same are silicious. 



Arg. = Stiff impermeable clays, etc. 



Si. S. = Finegrained permeable silicious sandstone. 



Ca. S. = Compact impermeable calcareous or rather marl-sandstone. 



Ca. = Limestone. 



Metam. = Includes all other rocks, abounding in alkaloids or basic acids, such as gra- 

 nites, syenites, etc., also schistose rocks, etc. 



The kind of forest, in which the tree principally grows, is noted. The shade or light- 

 loving propensities of trees and other plants are an important matter of consideration with 

 the forester and arboriculturist in all questions of plantations. I have, therefore, also intro- 

 duced remarks thereon. However I can give only approximately accurate accounts of such 

 relations. They are indicated in the following way : 



s. = Shade-loving. 



I. = Light-loving. 



s. I. = More or less indifferent in this respect. 



. X ^. = Shade in rainy season, light iu dry season (applicable more to shrubs, etc). 



.- I. =z Shade in youth, light when full-grown (chiefly applicable to lofty, often leaf- 

 shedding trees growing in evergreen forests). 



It is natural that of far the greater number of trees the particulars indicated above are 

 as yet unknown. The information given in this respect had to be restricted chiefly to those 

 trees, which I was myself fortunate enough to meet with. To those collected by others 

 little could be added, besides the province in which they grow. 



I will give here some of the formulae as examples with a view to shew how tbey would 

 read, if put in words. 



L . ^Q^iQ~Q^Q^Y2 ^^- ^' ~ '^- ^'^'- ^ ^^^^')- SS- == "" ^ leaf-shedding tree 



(shedding leaves during cold season) 120 to 150 feet high with a clean stem of 80 to 100 feet 

 by 6 to 12 feet girth, occurring all over Burma from Ava and Chittagong down to Tehasserim, 

 also frequent on the Andamans, up to an elevation of 20U0 feet. Grows ou all formations 

 except on saline grounds, but grows best on permeable silicious standstoue. 



E. -77r^?i='^o (A. M. ~T. 3000-5000). SS. = oo . 

 40 45-7 8 



