Duabanga moluccana Blume, Mus. Bot. 1 (1849)

Latin for 'from the Moluccas'.

Duabanga borneensis R.Knuth

Can be separated from Duabanga grandiflora by the flowers, which are 4-merous and with 12 stamens in D.moluccana, but 5-8-merous and > 50 stamens in D. grandiflora. The distribution of the two species does not overlap. Sub-canopy tree up to 25-35 m tall and 100 cm dbh. Stipules absent. Leaves opposite, simple, penni-veined, secondary veins forming marginal vein, glabrous. Flowers ca. 39 mm diameter, white-pink, flowering at night, placed in panicles. Fruits ca. 19 mm long, green-brown, capsule filled with numerous small, winged seeds.

Tree, 25-35 m, sometimes up to 45 m, 70-100 cm thick; trunk columnar, unbuttressed. Very young branchlets and both surfaces of very young leaves rather densely clothed with appressed short thickish brown hairs, very soon glabrescent; young branchlets obtusely quadrangular, becoming terete with age. Leaves ovate, oblong or lanceolate from a shallowly cordate base, acuminate, firmly coriaceous, on either side of the (on the lower surface) much prominent costa with numerous widely patent arcuate lateral nerves inarching near the margin and forming there a strong intramarginal nerve, darkgreen above, paler beneath, 7-30 by 4-12 cm; petiole 4-8 mm. Corymbs few- to rather many-flowered, 4-15 cm across, dense or rather lax, at first finely pubescent, afterwards glabrous. Pedicels thick, 1-1.5 cm (in bud 0.5 cm, in fruit to 3.5 cm). Buds ovoid-oval, shortly acuminate, with 4 longitudinal ribs (formed by the contiguous margins of the sepals). Flowers inodorous? Calyx when fully expanded during anthesis 2.5 cm diam., afterwards slightly enlarged; segments shortly acuminate, acute, under fruit patent or reflexed. Petals caducous, shortly clawed, oval, yellowish, about as long as sepals. Stamens 1-seriate, on a narrow circular rim; filaments with a broadly linear lower half and a filiform-subulate upper half; anthers at first yellow, afterwards brown. Style pale green; stigma dark green or red. Capsule ovoid-oblong, 2.5-3 cm long, 4-valved. Seeds co, 5-6 mm long (2-2.5 mm long tails included); nucleus +/- 1 mm.

In disturbed (open sites) in mixed dipterocarp, swamp and sub-montane forests up to 1500 m altitude. Usually on alluvial sites and along rivers and streams.

The wood is used for boxes and firewood, but also for house and boat building.

Java, Lesser Sunda Islands, Borneo, Philippines, Celebes, Moluccas, New Guinea.

Local names
Bali: Kadjimas.
Borneo: Benung kasung, Binuang, Binuang laki, Magas, Mas, Sawak, Sawi, Sawih, Sawik.
Java: Taker, Takir.
Lombok: Radjumas.
Philippines: Adha, Adka, Karawan, Lubtub (Bik.); Agas, Banabang-bugton, Binuang, Buluang, Loktob, Lokton, Luktub, Malapalikpik (Tag.); Arik, Kadig (Ibn.); Bukag, Kadil, Kadir (Ilk.); Buyukan (God.); Daha (Mbo, P. Bis.); Dapul (Ting.); Hoi (Bon.); Iloilo (p. Bis.), Kadel, Karig (Neg.); Lamod (Mag. Bag.); Lutub (Sul.). Talaud: Waroh.