1 20 Dipterocarpacecs. [Doona. 



veins numerous, slender, inconspicuous, pellucid, with minute 

 reticulations between, margins at base usually rigidly revolute, 

 giving a rhomboidal form to the leaf, petiole ^ in., slender, 

 curved ; fl. \ in. diam., panicles fcw-fld., lax, axillary and 

 terminal, shorter than or scarcely exceeding 1., ped. ^ in., 

 glabrous ; sep. obtuse, glabrous ; pet. oval, obtuse, entire or 

 notched at tip, minutely silky outside ; appendage as long as 

 anth. ; ov. glabrous ; enlarged fruit-sep. ijin., wings obovate- 

 oblong, obtuse, twisted, with about 10 inconspicuous veins; 

 nut quite concealed by enlarged base of sep., sharply pointed. 



Lower montane zone and upper zone of moist low country, 1000- 

 4000 ft.; common and formerly much more so. Fl. March-May; 

 pale rose colour or quite white. The enlarged sep., when half grown, a 

 brilliant crimson. 



Endemic. 



A characteristic tree of the lower hill-forests, now much cleared. The 

 mode of branching horizontally chiefly at the top, and the preference of 

 the tree for the crests of hills, which causes their outlines to stand out 

 against the sky, gives the tree at a distance much the appearance of the 

 Stone Pine of Italy. 



The timber is light, moderately hard, pale greyish-brown, durable, 

 and greatly in request for shingles, whence the tree is often called 

 • shingle-tree.' It burns with a bright flame. An e.xcellent colourless 

 Dammar-like resin exudes from the trunk. 



2. Z>. affinis, Thw. Eniim. 35 (1858). 



C. P. 3409. 



Fl. B. Ind. i. 311. 



A large tree, twigs glabrous ; 1. 2-2^ in., lanceolate, 

 rounded at base, caudate-acuminate, rather thick, drooping, 

 lat, veins numerous, inconspicuous, much arched, midrib 

 channelled above, margin revolute at base and slightly re- 

 curved throughout ; fl. drooping, articulated on rather long 

 ped., in axillary and terminal panicles about as long as 1., 

 nearly \ in. diam. ; sep. oblong, obtuse, very resinous ; pet. 

 silky on back ; appendage about \ length of anth. ; enlarged 

 fruit-sep. rather less than \\ in., wings broadly oblong- 

 spathulate. 



Moist low country; very rare. Singhc Raja Forest, April 1S55; 

 Kokawita, Kukul Korale, 1892 (Lewis). 



Endemic. Y\. March ; creamy-white. 



More material is required for the satisfactory determination of this 

 species. 



C. P. 3712 was accidentally referred to this by Thwaites (Enum. 402), 

 and the description in Fl. H. Ind. is taken from that C. P. number (which 

 is from Lihinigala, Hewesse, collected in March, 1861). The specimens 

 are in young bud, and differ from D. ajjinis in the venation of the leaves, 

 which is intermediate between that of D. vcnulosa^ Thw. and D. obhmj^a^ 

 to one of which species they belong. 



