OF THE DIPTEROCARPACEÆ. 53 
7. Doona CORDIFOLIA, Thw. Enum. Pl. Zeyl. (1858) 35; 
Trimen, Fl. Ceylon, i. 122. 
8. D. ovatrrorra, Thw. Enum. Pl. Zeyl. (1864) 402; Trimen, 
Fl. Ceylon, i. 123. 
9. D. osroxaa, Thw. in [London] Journ. Bot. xxiii. (1885) 
206; Trimen, Fl. Ceylon, 1. 123. 
10. D.(?) vExvLOsa, Thw. Enum. Pl. Zeyl.(1864) 402; Trimen, 
Fl. Ceylon, i. 123. 
11. D. MACROPHYLLA, Thw. Enum. Pl. Zeyl. (1864) 402; 
Trimen, Fl. Ceylon, i. 124. 
12. D. prsrrcHa, Pierre, Fl. For. Cochinch. fase. 15 (1890), 
t. 237 in obs.— V atica disticha, A. DC. in DC. Prodr. xvi. 
(pars 2), 620; Dyer in Hook. f. Fl. Brit. Ind. i. 308.— 
Sunaptea ? disticha, Trimen, Cat. Ceylon Pl. (1885) 9, et 
Fl. Ceylon, i. 127. 
The buds of .D. disticha are so young in specimens at Kew and 
the British Museum, that a satisfactory examination is not 
possible. But the calyx is imbrieate, and the appendix of the 
connective resembles that of D. nervosa, Thw., with which Pierre 
comparesit. The bracts are hairy, but branches of inflorescence 
and calyx are perfectly glabrous. As regards the internal 
structure, it has numerous mucilage-cavities in the cortex, resem- 
bling those of Doona. Regarding internode and petiole, I must 
reserve my opinion until I have been able to make a more 
complete examination of this interesting species. 
5. Horta, Roxb. 
(Including Petalandra, Hasskarl, Hancea, Pierre.) 
Stipules minute or small, early deciduous. Flowers almost 
always in unilateral spikes or racemes, these generally in racemose, 
rarely compound panicles. Calyx often glabrous, but petals 
always hairy outside. Calyx-segments imbricate, the two outer 
ones in the flower generally much larger than the others; growing 
into thin membranous wings, as the fruit ripens. Stamens 15, 
10 in a few species; anther-cells equal; connective prolonged 
Into a long awn. Stylopodium in most species large, in some (of 
Section Dryobalanoides and Petalandra) wanting, but generally 
indicated by a ring of hairs. 
The seed I have had an opportunity of examining in 15 of 
the 46 species. In 9 species I have found the structure which 
