Hopea mengerawan Miq., Sum. (1860)
Named after the local name for this species.
Hancea mengerawan Pierre
Upper canopy tree up to 44 m tall and 103 cm dbh. Stem with resin. Stipules
small, dropped early. Leaves alternate, simple, penni-veined, inconspicuous
secondary veins placed close together. Flowers ca. 5 mm in diameter,
white-yellowish, placed in panicles. Fruits ca. 10 mm long, green-red, with two
ca. 70 mm long wings, wind dispersed.
Tall buttressed tree with dark fissured bark. Twigs,
petiole and leaf beneath caducous lepidote, parts
otherwise glabrous. Twig c. 2 mm apically, slender;
stipule scars short, pale. Leaf bud to 2 by 1 mm, ovoid.
Stipule fugaceous. Leaf 6-12 by 2.5-5 cm, lanceolate,
thickly coriaceous; base cuneate; acumen to 1.5 cm
long, slender but evident beneath, with many short to
subequal secondaries; midrib stout, prominent, on
both surfaces; petiole 9-11 mm long, relatively short.
Panicle to 3 cm long, terminal or axillary, terete, singly
branched; branchlets bearing to 6 secund flowers;
bracteoles c. 2 mm long, acicular, fugaceous. Flower
pale yellow; bud to 3 by 2 mm. ovoid. Calyx lobes
ovate, the 2 outer narrower, more coriaceous than the
frequently suborbicular 3 inner. Petals sericeous on
parts exposed in bud; stamens 15, in 3 unequal
verticils; filaments compressed at base, tapering and
filiform below the subglobose anthers; appendage to
connective slender, 2-3 times length of anther. Ovary
ovoid, glabrous; style c. 2 times length of ovary,
villous in the basal 5. Fruit pedicel to 2 mm long,
slender. 2 longer calyx lobes to 7 by 1.2 cm, narrowly
spatulate, narrowly obtuse, c. 3 mm broad above the
to 7 by 4 mm narrowly ovate saccate thickened base; 3
shorter lobes to 6 by 5 mm, ovate, acute, saccate. Nut
to 10 by 5 mm, narrowly ovoid; style remnant slender. [from Flora Malesiana]
In undisturbed mixed dipterocarp forests up to 500 m altitude. Usually on
ridges and hillsides with poor sandy to clayey soils, also on ultrabasic.
The resin and timber are used. The resin was considered one of the best
varieties in Sumatra and Malaya.
Peninsular Malaysia, Sumatra, Borneo.
Borneo: Bankirai telor, Bangkirai tembaga, Emang, Emang Jangkar, Luis, Njerakat, Selangan.
Malaysia: Merawan penak, Merawan hitam, Pengerawan, Pengerawan penak.
Sumatra: Merawan banglai, Chengal, Chengal bulu.