Dryobalanops lanceolata Burck, Ann. Jard. Bot. Btzg. 6 (1887)

Latin for 'lance-shaped', referring to the leaves.

Dryobalanops kayanensis Becc.
Dryobalanops oblongifolia Dyer

Emergent trees up to 69 m tall and 230 cm dbh. Stem with resin. Stipules up to ca. 12 mm long. Leaves alternate, simple, penni-veined, rather narrow and long, secondary veins placed close together. Flowers ca. 14 mm in diameter, white-yellow, placed in panicles. Fruit ca. 15 mm long, green-yellow-red, with five up to ca. 90 mm long wings placed on top of the calyx cup, wind dispersed.

Emergent trees up to 69 m tall and 230 cm dbh. Stem with resin. Leaf bud and stipule sometimes shortly fugaceous tomentose, otherwise entirely glabrous. Twigs 1.5-2 mm apically, slender, dotted with minute pale brown lenticels, smooth but for the prominent ribs above the lateral bundles of the petiole. Bud 4 by 1 mm, narrowly lanceolate. Stipule to 12 by 1 mm, narrowly lanceolate. Leaves 7-10 by 2-3.5 cm, lanceolate, thinly coriaceous, base cuneate, with revolute margin, acumen to 1 cm long, slender; margin frequently undulate; petiole c. 1 cm long, slender. Panicle to 6 cm long; terminal or axillary, ribbed and angular on drying, glabrous; simple or singly branched. Flower bud to 12 by 5 mm, fusiform, obtuse. Calyx glabrous; lobes subequal, lanceolate, obtuse. Corolla white; petals lanceolate, acute, glabrescent. Stamens c. 30, subequal, shorter than the style; filaments compressed, slender, tapering, united at base; anthers linear; appendage to connective short, hardly exceeding anther apex. Ovary small, ovoid, glabrous; style filiform, c. 3 times length of ovary, glabrous. Fruit calyx with to 2 cm diameter, to 5 mm deep, shallow cup at base, impressed at the pedicel; with a shallow tubercle at the base of each calyx lobe; lobes to 9 by 2 cm, spatulate, equal, obtuse, tapering gradually to a 3-5 mm broad base. Nut to 2 cm long and diameter, ovoid to globose, glabrous, subacute. [from Flora Malesiana]

Widespread on fertile clay-rich soils, abundant on undulating land on basic volcanics and calcareous shale to 700 m.

Timber is used. Resin is used as fuel and anti infectant.


Local names
Borneo: Adu (Kwijau), Jalam (Dusun), Kapur, Kapur bukit (Brun.), Kapur daram (Brun.), Kapur paji (Iban), Kapur paya, Ngeri (Bassap), Paji (Iban), Sesuan (Murut).