238 XX. DIPTE ROC ARP ACE.® . [Hopea. 
awn long. Ovary glabrous with hairy ring at base. Fruit ovoid 
apiculate, -3 in. long, outer wings oblanceolate obtuse, narrowed 
to base, reticulate, 7-nerved, 175 to 2 in. long, '2 to *25 in. broad, 
inner ones as long as fruit. Hab. Common in forests. Johor at 
Pinerong (Cantley). Malacca (Maingay); Sungei Hudang (Good- 
enough). Dindings, Pengkalan Bharu (Foxw r orthy). Perak, Thai- 
ping (Kunstler). Penang, Government Hill at 1200 ft. altitude 
(Curtis)! Distrib, Borneo. Native name: Merawan Kunyit. 
(9) H. Pierrei Hance, Journ. Bot. 1877, p. 329; Brandis, 
Journ. Linn. Soc. xxxi. 67, pi. 11, fig. 10. Hancea Pierrei Pierre, 
FI. For. Cochinchine, 16, t. 248. Hopea intermedia King, l.c. 126. 
A tree 60 to 80 or more ft. tall, 8 to 12 in. or more through, 
glabrous except a very slight puberulousness on the inflorescence. 
Leaves bluntly ovate cuspidate, base round or slightly cuneate, 
rather stiffly coriaceous; nerves about 10 pairs very fine, visible 
beneath and occasionally above, 2*5 in. long, i*i in. wide; petioles 
•2 to -25 in. long. Flowers very small in unilateral panicles, 1 in. 
long. Branches '25 to -5 in. long.' Flowers secund, pendent, glabrous, 
•18 in. long. Sepals ovate, drying black. Petals silky outside, 
red. Stamens 15; awns twice as long as the anthers. Ovary 
glabrous or nearly so, as is stylopodium. Fruit ovoid-conic 
acuminate, "2 to *3 in. long; outer wings linear-oblong, blunt, 
narrowed to base; nerves slender 7 to 8, reticulations prominent, 
1 in. long, *25 in. wide, base thickened, concave, inner wings much 
shorter than fruit, ovate. Hab. Forests. Singapore, Garden 
Jungle. Malacca, Sungei Hudang (Goodenough); Ayer Panas 
(Kinsey). Perak, Thaiping Hills (Kunstler). Penang, Muka Head 
(Curtis). Distrib. Borneo, Cambodia. Native name: Jangkang. 
I am quite unable to see any valid difference between H. Pierrei and 
H . intermedia King, though Brandis keeps them separate. The fruit in the 
Perak plant is very small and the wings very narrow, but Dipterocarps do 
differ in this point frequently. Brandis refers the Singapore plant and a 
plant collected by Curtis at Sungei Penang to H. Griffithii Kurz, and a variety 
of this var. pedicellata. This species has lanceolate leaves narrowed at both 
ends, instead of being round at the base. It is a native of Mergui. The 
Singapore plant is clearly H. Pierrei. The Sungei Penang plant collected 
by Curtis differs in having many more nerves to the leaf, the secondary nerves, 
invisible in Pierrei, are visible in this specimen and the leaves are more oblong, 
the panicle is stouter, the petals narrower and longer. It is not at all like 
H. Griffithii. It is just possible that it is a hybrid between H. Pierrei and 
H. micrantha. King refers it to H. micrantha, which is certainly near to it. 
(10) H. Mengarawan Miq. FI. Ind. Bat. Supp. 492; Burck, 
Ann, Jard. Buitenz. vi. 240. 
A big tree 60 to 100 ft. tall, 2 to 3 ft. through, glabrous except 
inflorescence. Leaves bluntly acuminate, ovate to ovate-lanceolate, 
2’5 to 4 in. long, 2 in. broad or less; nerves very fine and numerous, 
almost invisible on the smooth upper surface, secondaries nearly 
as conspicuous; petioles *5 in. long. Flowers pendulous in panicled 
