238 XX. DIPTEROCARPACEiE. [HopeU. 



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). Bindings, Pengkalan Bharu (Foxworthy). Perak, Thai- 

 ping (Kunstler). Penang, Government Hill at 1200 ft. altitude 

 (Curtis). Disirib. Borneo. Native name : Merawan Kunyit. 



(9) H. Pierrei Hance, Journ. Bot. 1877, p. 329; Brandts, 

 Journ. Linn. Soc. xxxi. 67, pi. 11, fig. 10. Hancea Pierrei Pierre, 

 Fl. For. Cochinchine, 16, t. 248. Hopea intermedia King, I.e. 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'l in. wide; petioles 

 •2 to '25 in. long. Flowers very small in unilateral panicles, i 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 stjdopodium. Fruit ovoid-conic 

 acuminate, -2 to -3 in. long; outer wings linear-oblong, blunt, 

 narrowed to base; nerves slender 7 to 8, reticulations prominent, 

 I 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). Disirib. Borneo, Cambodia. N alive 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. Grifflthii 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. Grifflthii. 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. Fl. Ind. Bal. Siipp. 492; Burck, 

 Ann. Jard. Builenz. 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 



