Doofia.] Dipterocarpacece. 119 



into a conspicuous clavate appendage; ov. as in Shorea; three 

 of the enlarged fruiting sep. with long wings, the other 2 

 inconspicuous, thickened bases very closely adpressed 

 to nut, resinous, wings obscurely veined ; cotyledons much 

 plicate and convoluted, with the testa following the con- 

 volutions. — Endemic Genus.* 



Caryolobis^ Gaertner, should strictly be the name of this genus, as 

 there can be no doubt that the C. mdica described and figured by him 

 (Fruct. i. 215 and t. 45 f. 4) is one of our species, probably D. trapezifolia. 

 He gives the Sinhalese name, ' Beralie,' for it. 



Pierre in Fl. For. CocJiinch. describes the embryo as surrounded by 

 an abundant and sometimes ruminate endosperm ; I have not been able 

 to corroborate this in the fresh specimens I have examined. 



It is a difficult matter to discriminate the species of this genus ; the 

 fl. and fr., so far as they are known, present great similarity, and 

 in the following key I have been forced to attempt to define them 

 by their leaves. It is probable that there are yet other species in 

 Ceylon. 



L. under 6 in. 



Lat. veins more than 10 (except sometimes No. 7). 

 Lat. veins inconspicuous. 



L. acute at base i, D. zeylanica. 



L. rounded at base 



Fruit-cal. i| in 2. D. AFFINIS. 



Fruit-cal. i|-2 in 3- D. Gardneri. 



Lat. veins conspicuous. 



Conspicuous both above and beneath. 

 Fl. laxly arranged. 



L. over 3 in., lat veins 10-12 . . 4. D. NERVOSA. 



L. under 3 in., lat. veins about 20 . 5. D. trapezifolia. 



Fl. crowded 6. D. congestiflora. 



Conspicuous beneath only . . . 7. D. CORDIFOLIA. 

 Lat. veins 10 or less. 

 Lat. veins all parallel. 



L. ovate or ovate-oval . . . . 8. D. OVALIFOLIA. 

 L. lanceolate-oblong . . . . 9. D. oblonga. 

 Lower lat. veins ascending . . .10. D. venulosa. 

 L. over 6 in 11. D. macrophylla. 



I. I>. zeylanica, Thw. in Kew Journ. Bot. iv. 7 (1852) Dun, S. 



Thw. Enum. 34. C. P. 2423. 



Fl. B. Ind. i. 311. Kew Journ. Bot. iii. t. 12. Bedd. Fl. Sylv. t. 97. 



A large tree, reaching 60 or more ft., trunk erect, much 

 branched at top with horizontal branches, bark rough, cinna- 

 mon-brown, twigs glabrous, drooping ; 1. 2-3 in., lanceolate, 

 acute at base, attenuate-caudate, glabrous and shining, lat. 



* Burck, on anatomical grounds, refers to Doona 4 Malayan species 

 (including Hopea odorata, Roxb., and Petalandra micrantha, Hassk.) 

 but the union does not appear to me very natural. 



