Vatica\ 
XX. DIPTEROCARPACE.E. 
245 
base cuneate; nerves very fine, 7 pairs, -4 to 575 in. long, 1*25 to 
175 in. wide; petioles slender, i‘25 in. long, dilated towards the 
apex. Stipules ovate-cordate obtuse, ‘25 to 75 in. long and nearly 
as wide. Panicles lax, axillary, few-flowered. Flowers distant; 
pedicels '2 in. long. Sepals short, ovate connate half their length 
and sparingly inside, scurfy puberulous. Petals 4 times as long, 
linear-oblong, scurfy on the back, not twisted. Stamens 10; 
filaments very short; anthers shortly apiculate. Ovary conic 
pubescent grooved; style columnar. Stigma clavate. Fruit 
unknown. Hah. Very rare. Malacca on Mount Ophir (Hullett 
781). A very remarkable plant, quite unlike any other. 
12 . ISOPTERA, Scheffer. 
Tree. Leaves coriaceous. Flowers in axillary and terminal 
panicles. Calyx-tube very short. Sepals ovate-round, imbricate. 
Petals linear, twisted. Stamens 30 to 35; anthers ovate; cells 
divergent at base; connective awned. Ovary 3-celled; cells 
2-ovuled. Fruit, i-seeded; pericarp coriaceous; calyx an open 
cup with 3 large round spreading lobes and 2 smaller ones. Species 1. 
(1) I. borneensis Scheff. Ann. Bot. Jard. Buiienz. vi. 222; 
King, l.c. 129. (Fig. 22 b, p. 212.) 
A large tree, but often flowering quite small. Leaves thinly 
coriaceous, oblong sub-acute, base rounded, glabrous; nerves 8 or 9 
pairs, 4 to 5 in. long, 175 to 2 in. wide; petioles - 5 in. long. Panicles 
lax, few-flowered, 4 to 6 in. long, stellate-pubescent. Flowers 
pedicellate, 1*25 in. across, green. Sepals tomentose. Petals 5 in. 
long, tomentose. Stamens, filaments dilate at base. Ovary silky. 
Fruit *25 in. through. Calyx forming a cup with 4 spreading lobes, 
the outer ones ‘65 in. long and wide. Hob. In forests. Muar at 
Kepong (Curtis). Pahang, river, woods; Tenjai, Ulu Rumpin 
(Foxworthy). Distrib. Borneo, Banka. Native name : Senkawang 
or Tengkawang. Use: Yields the valued vegetable fat, Minyak 
Tengkawang. 
13 . BALANOCARPUS, Beddome. 
Medium to vast trees. Leaves rather small. Flowers small, 
secund on panicled racemes. Sepals distinct or connate at base, 
2 external to the others. Petals elliptic oblique. Stamens 15 
attached to petal-bases in 3 rows or 10 in 2 rows; filaments dilate 
at base; anthers ovate, awned. Style short. Stigma entire. Fruit 
oblong or sub-globose; pericarp woody. Calyx forming a 5-lobed 
cup round the base, free from it, not developing into wings. Species 
about 12, South India, Malaya. Use: Timber highly valued, 
Chengai. Dammar, very clear and transparent or black. 
Stamens 15. 
Flowers very small, glabrous and dark coloured 
when dry. 
Fruit small ellipsoid, base only covered by 
sepals; flowers silky .... (1) B. penangianus 
