Dipterocarpus tempehes Sloot., Reinwardtia 5 (1961)
Latin for the local name in Borneo.
Upper canopy tree up to 50 m tall and 116 cm dbh. Stem with resin. Stipules
up to ca. 80 mm long. Leaves alternate, simple, penni-veined, glabrous, lamina
folded between secondary veins. Flowers ca. 54 mm in diameter, white-pinkish,
placed in racemes. Fruits ca. 35 mm long, green-yellow, wingless.
Twigs, leaf bud, stipule outside, and petiole very shortly densely evenly buff pubescent, leaf nervation
beneath and stipule within sparsely so; nervation above caducously so. Twigs to 2 by 4 mm towards
the compressed apices, much branched, slender, becoming terete; stipule scars slender, dark. Bud to 12
by 3 mm, slender, lanceolate, acute. Stipule to 8 by 1.2 cm, lorate, acute. Leaves 6-12 by 3.5-8 cm,
broadly elliptic to obovate, thickly coriaceous, with broadly cuneate base and acute to shortly abruptly
acuminate apex; prominently persistently folded between the 9-12 pairs of sharply ascending nerves;
nerves at 35-40 degrees; tertiary nerves very slender, densely scalariform; petiole 1-2 cm long, short,
drying densely buff pubescent. Raceme to 2.5 cm long, very short, axillary, terete, densely shortly
evenly buff pubescent, unbranched, bearing to 3 distichous flowers. Flower bud to 3 by 0.8 mm. Calyx
and corolla typical, calyx glabrous. Stamens c. 30, somewhat shorter than anther; anther narrowly oblong,
tapering into the acicular appendage; appendage as long as anther, prominent. Ovary ovoid, pubescent;
style filiform, pubescent except in the apical 1/3. Fruit pedicel vestigial. Calyx glabrous; tube to 4
by 4 cm, turbinate, with prominent but unraised pale lenticels; calyx lobes vestigial. [from Flora
In undisturbed mixed dipterocarp forests up to 400 m altitude. Mostly on
alluvial sites and along rivers, rarely on hillsides. On clayey to sandy soils.
Timber is commercially harvested.
Borneo: Bajan, Bajan uhit, Becupu, Karup, Keruing, Keruing asam, Keruing bukit,
Keruing salatus, Keruing tapayan, Ran, Senara, Sendara, Tempehes.