Dysoxylum flavescens Hiern, in Hook.f., Fl. Brit. Ind. 1 (1875)

Synonyms
Alliaria flavescens Kuntze
Alliaria griffithii (Hiern) Kuntze
Dysoxylum griffithii Hiern in Hook.f.
Hartighsea ramiflora Griff.

Diagnostics
Mid-canopy tree up to 39 m tall and 98 cm dbh. Stipules absent. Leaves alternate, compound, leaflets penni-veined, venation inconspicuous, glabrous. Flowers ca. 14 mm diameter, yellow, placed in racemes. Fruits ca. 34 mm diameter, yellow-red, dehiscent capsules.

Description
Tree to 39 m tall; bole to 98 cm diam.; buttresses to 1 m tall and 60 cm out. Bark superficially cracked, brown with star-shaped pustulate lenticels; inner bark pinkish; sapwood straw; heartwood pale reddish brown. Leafy twigs c. 1 mm diam.; apical bud stiletto-like. Leaves to 48 cm long, spirally arranged, 3-5-jugate, glabrous; petiole 8-13 cm, flattened adaxially, swollen and often blackish (when dried) at base. Leaflets 7.5-13 by 3.4-4.7 cm, narrowly elliptic-ovate, subcoriaceous, subopposite, often shiny adaxially, bases rounded to subcuneate, +/- asymmetric, apices acuminate, costae c. 13-19 on each side, indistinct, subsquarrose and spreading, inarched only near margin but not looped; petiolules 3-4(-9) mm, blackened at base when dried. Thyrses 5-10 cm, subspiciform with fascicles of 1 or a few sessile flowers; bracts c. 0.5 mm, triangular. Calyx c. 2.5 mm diam., almost flat, puberulent without, confluent with pseudopedicel c. 1 mm long, margin deeply 4-lobed. Petals 4, c. 7 mm long, creamy yellow, subglabrous to puberulent without. Staminal tube thick, tough, weakly pilose distally, margin crenate; anthers 8, ovate, included. Disk shortly cupuliform, glabrous, fleshy. Ovary pubescent. 4-locular, each locule with 2 collateral ovules; style pubescent in proximal half; stylehead discoid. Capsule at least 4 cm diam., depressed-globose, weakly stipitate, reddish orange. Seed brown to black with small arilloid hilum on one side, seedcoat apparently largely pachychalazal; cotyledons green. [from Flora Malesiana]

Ecology
In undisturbed mixed dipterocarp forests up to 1700 m altitude. On hillsides with sandy soils.

Uses
The wood is commercially important.

Distribution
Peninsular Malaysia, Sumatra, Borneo.

Local names
Borneo: Bohono.