Dipterocarpus obtusifolius (PROSEA)
Dipterocarpus obtusifolius Teijsm. ex Miq.
- Protologue: Ann. Mus. Bot. Lugd.-Bat. 1: 214 (1863).
- Dipterocarpus vestitus Wallich ex Dyer (1874),
- Dipterocarpus punctulatus Pierre (1889).
- Malaysia: keruing beludu, atoi (Peninsular)
- Burma: in bo, in byu, in hmwe sok
- Cambodia: (daëm) thbaèng, thbaèng ba:y sra:, thbaèng snaèng
- Laos: (maiz) s'a:d
- Thailand: yang-hiang (general), krat (Thai, northern), ko satiang (Lua, peninsular)
- Vietnam: dầu trà beng.
Burma, Cambodia, Laos, Vietnam, Thailand and Peninsular Malaysia.
The timber is used as keruing.
- A small to medium-sized deciduous tree of up to 30 m tall, bole often of poor form, up to 20 m long, up to 80 cm in diameter, bark surface deeply fissured, greyish-brown; buds lanceolate, pale fulvous to buff hirsute or glabrous.
- Leaves broadly ovate, 14-22 cm × 10-16 cm, base obtuse or subcordate, apex obtuse or subacute, prominently plicate, crenate in the distal half, secondary veins 14-20 pairs, ascending, petiole 2.5-4 cm long, stipules lorate, obtuse, outside tomentose.
- Stamens about 30.
- Fruit calyx tube subglobose, smooth, glabrescent, 2 larger fruit calyx lobes up to 15 cm × 3 cm, 3 shorter ones up to 15 mm × 10 mm.
D. obtusifolius is a characteristic and frequently gregarious, fire-resistant tree in dry dipterocarp or bamboo forest. In Indo-China a glabrous form is distinguished and called var. subnudus Ryan & Kerr. The density of the wood is 750-900 kg/m3 at 15% moisture content. A natural hybrid between D. obtusifolius and D. costatus has been observed in Thailand and Burma.
140, 235, 258, 628, 677, 748, 756.
Main genus page
- T. Smitinand (selection of species),
- C. Phengklai (selection of species),
- L.E. Groen (selection of species)