Shorea laevis Ridl., Fl. Mal. Pen. 1 (1922)
Latin for 'smooth or glabrous'.
Hopea laevifolia Parijs
Shorea laevifolia Endert
Shorea rogersiana Raizada & Smithinand
Emergent tree up to 75 m tall and 148 cm dbh. Stem with resin. Stipules up
to ca. 8 mm long. Leaves alternate, simple, penni-veined, glabrous and shiny.
Flowers ca. 5 mm in diameter, greenish-yellow, placed in panicles. Fruits ca. 10
mm long, green, with three ca. 30 mm long wings, wind dispersed.
Vast, prominently buttressed tree. All vegetative
parts epilose. Twig c. 1 mm diameter apically, much
branched, slender, terete, smooth; stipule scars small,
obscure. Bud c. 3.5 by 1.5 mm, narrowly ovoid. Stipule
to 8 by 2 mm, narrowly lanceolate, acute, fugaceous.
Leaves 6.5-10 by 2.5-4 cm. narrowly ovate-lanceolate;
falcate, thinly coriaceous, cream lepidote
beneath in mature trees; base subequal, broadly
cuneate; acumen to 2 cm long, slender; nerves 11-14
pairs, slender, coriaceous, dense, curved, at c. 50-60 degrees.
unraised on either surface as also the midrib; tertiary
nerves slender, densely scalariform, diagonal to
nerves; petiole 1-1.5 cm long, slender, geniculate.
Panicle to 12 cm long, terminal or axillary, slender,
terete, shortly persistently pale cream grey pubescent,
+/- glabrescent; singly or doubly branched, branchlets
to 3 cm long, bearing to 9 distichous flowers; bracteoles
to 2 mm long, linear, pubescent, fugaceous.
Flower bud to 2 mm long, globose. Calyx shortly pale
cream-brown tomentose outside, glabrous within; 3
outer lobes ovate-deltoid, subacute; 2 inner lobes
smaller, suborbicular. Petals small, oblong, shortly
pubescent on parts exposed in bud. Stamens c. 50;
filaments slender, tapering, sparsely barbate towards
the apex; anther oblong, the longer, outer, sacs
barbate at base and apex; appendage to connective
small, barbate. Ovary and stylopodium small, conical,
densely buff tomentose, crowned by a short glabrous
style. Fruit calyx shortly buff pubescent on both
surface; 3 longer lobes to 6.5 by 1 cm, oblong,
chartaceous, slightly broader at the obtuse apex,
untapering but saccate and adpressed to the nut at the
base; 2 shorter lobes to 4 by 0.5 cm. subacute,
otherwise similar. Nut to 1.5 by 0.9 cm, ovoid, shortly
densely evenly buff pubescent; style remnant to 4 mm
long, tapering, frequently bent over. [from Flora Malesiana]
In undisturbed mixed dipterocarp forests up to ca. 600(-1000) m altitude. Mostly on
hillsides and ridges on skeletal or dry soils, but also on alluvial sites. On clay to
The timber is used.
Peninsular Burma and Thailand, Peninsular Malaysia, Sumatra, Borneo.
Borneo: Bangkirai, Bangkirai lampong, Bangkirai tanduk, Banuas, Banuas layang,
Cengal, Damar kapala tupai, Gelam, Merenting, Mikai, Penjau, Selangan batu,
Selangan batu bukit, Selangan batu kumus, Tengelan menpelan.
Malaysia: Kumas, Kumas merah, Kumas hitam, Selimbar, Damar laut kuning.