Hopea pedicellata (Brandis) Sym., Gard. Bull. S.S. 9 (1938)

Synonyms
Hopea griffithii var. pedicellata Brandis
Hopea siamensis Heim

Diagnostics
Emergent tree up to 66 m tall and 92 cm dbh. Stem with resin. Stipules up to ca. 2 mm long. Leaves alternate, simple, penni-veined, with inconspicuous secondary veins placed close together. Flowers ca. 3 mm in diameter, white-yellow, placed in panicles. Fruits ca. 6 mm long, green-red, with two ca. 30 mm long wings, wind dispersed.

Description
Medium-sized tree with flaky bark, thin buttresses and sometimes a few stilt roots. Young twig and domatia grey-brown puberulent, glabrescent; petiole, leaf bud and stipule persistently so. Twig c. 1 mm apically, slender, much branched, terete, smooth; stipule scars short, obscure. Bud to 1 by 1 mm, ellipsoid, obtuse, minute. Stipule small, linear, fugaceous. Leaves 4-9 by 1-3.5 cm, ovate-lanceolate, base cuneate; acumen to 1.5 cm long, subcaudate, slender; nervation dryobalanoid, main nerves c. 8-12 pairs, with subequal secondaries, indistinct, slender, hardly raised; midrib raised on both surfaces; petiole 6-8 mm long. Panicle to 2 cm long, terminal or axillary, terete, caducous puberulent; singly branched. Calyx glabrous, 2 outer lobes ovate, acute. 3 inner suborbicular, mucronate. Petals sericeous on parts exposed in bud, pale yellow. Stamens 15, unequal; filaments compressed at base, tapering abruptly medially and filiform below the oblong anthers; appendage to connective filiform, c. twice length of anthers. Ovary with stylopodium, cylindric-conical, attenuate, truncate, punctate in the distal half, surmounted by a short style. Fruit glabrous. Pedicel c. 2 mm long, 2 longer calyx lobes to 3 by 0.5 cm, spatulate. c. 2 mm broad above the c. 5 by 3 mm ovate saccate thickened base; 3 shorter lobes to 3 by 3 mm, ovate, saccate, adpressed to the nut. Nut to 6 by 4 mm, ovoid, abruptly acute. [from Flora Malesiana]

Ecology
In undisturbed mixed dipterocarp forests up to 1000 m altitude. On hillsides and ridges with rich clay soils.

Uses
The resin and timber are used.

Distribution
Indo-China, Thailand, Peninsular Malaysia, Borneo.

Local names
Borneo: Garik kecil daun, Luis, Selangan, Selangan batu merah.
Malaysia: Mata kuching bukit.