Hopea ferruginea Parijs in Fedde, Rep. 33 (1933)

Synonyms
Hopea intermedia (non King) Foxw.
Hopea micrantha (non Hook.f.) Dyer
Hopea myrtifolia (non Miq.) Heyne
Hopea pierrei (non Hance) Foxw.

Diagnostics
Upper canopy tree up to 41 m tall and 59 cm dbh. Stem with resin. Stipules up to ca. 1 mm long. Leaves alternate, simple, penni-veined, inconspicuous secondary veins placed close together, sometimes with domatia. Flowers ca. 4 mm in diameter, yellow, placed in short panicles. Fruits ca. 7 mm long, red-green, with two ca. 30 mm long wings, wind dispersed.

Description
Medium-sized flaky barked tree with stilt roots and living buttresses. Twig endings, petioles, midrib above and panicles densely +/- persistently greyish puberulent, petals outside densely cream pubescent. Twig c. 1 mm diameter apically, terete, becoming dark brown, smooth; internodes short; stipule scars obscure. Leaf hud minute; stipules minute, fugaceous. Leaves 4.5-7.5 by 1.5-4 cm, ovate to lanceolate, subcoriaceous; base cuneate, shortly decurrent; acumen to 1.5 cm long, slender, caudate; nervation dryobalanoid, main nerves c. 14 pairs with many subequal secondaries, distinct and frequently with +/- prominent axillary pubescent domatia especially in young trees; midrib slender but distinctly elevated on both surfaces; petiole 6-10 mm long, slender. Panicles to 2 cm long, axillary, slender, short, with to 8 mm long short branchlets bearing to 4 secund pale yellow flowers. Flower bud to 3 by 2 mm, ellipsoid. Sepals ovate, the 3 outer somewhat longer, acute or subacuminate, the inner acute. Stamens 15, unequal; filaments broadly compressed at base, tapering and filiform distally; appendage very slender, c. twice length of the subglobose anthers. Ovary ovoid, style somewhat longer, columnar, tapering, villous towards base. Fruit pedicel to 2 cm long, very slender; 2 longer fruit calyx lobes to 3 by 0.5 cm, spatulate, narrowly obtuse, c. 1.5 cm broad above the to 4 by 2.5 mm ovate saccate thickened base; 3 shorter lobes to 8 by 4 mm, ovate-acuminate, closely enveloping nut. Nut to 7 by 4 mm, ovoid, apiculate. [from Flora Malesiana]

Ecology
In undisturbed mixed dipterocarp forests up to 1500 m altitude. Mostly on hillsides and ridges, but also on alluvial sites. On clayey to sandy soils, also on limestone and ultramafic soils. Usually on deep fertile soils.

Uses
The resin and timber are used.

Distribution
Peninsular Malaysia, Sumatra, Borneo, Philippines.

Local names
Borneo: Banjutan, Betotas, Bunyit, Damar mata kuching, Damar putih, Luis, Merawan putih, Resak anakan, Selangan, Selangan batu, Selangan penak.
Malaysia: Mata kuching merah, Merawan mata kuching, Merawan jangkang, Merawan merah, Merawan pasir.
Sumatra: Gangsal (Djambi), Meranti emeh.