Archidendron ellipticum (Blume) Nielsen, Adansonia ser. 2, 19, 1 (1979)

Synonyms
Abarema elliptica (Blume) Kosterm.
Abarema waitzii (Kosterm.) Kosterm.
Albizia fasciculata (Benth.) Kurz
Feuilleea beccariana O.Kuntze
Inga elliptica Blume
Pithecellobium ellipticum (Blume) Hassk.
Pithecellobium fasciculatum Benth.
Pithecellobium waitzii Kosterm.

Description
Tree to 20 m high, 50 cm in diameter. Bark smooth, yellowish, greyish or pale ochre, or white with brown horizontal ridges, sometimes scaly; sapwood pale yellow to whitish, heartwood dark yellowish. Branchlets sometimes hollow and inhabited by ants (very often by red fierce tailor-ants). Branchlets terete, glabrous. Leaves: rachis 4-15 cm, glabrous, glands oblong or rhomboid, hardly raised or cushion-shaped, without raised margins, 3-5 mm; pinnae (1 or) 2 pairs, c. 5-15 cm, glabrous, glands obtriangular or rhomboid, flat, sessile, without raised margins; petiolules c. 6-8 mm, glabrous; leaflets 2-4 pairs per pinna, opposite, rigidly chartaceous, drying dark green above, bright green beneath, ovate, ovate-elliptic, elliptic, or obovate-elliptic, c. equal-sided, 3.5-20(-37) by 3-9(-18.5) cm, base symmetrically rounded or broadly cuneate, apex shortly and obtusely acuminate, both surfaces glabrous; principal lateral veins 6-8 per leaflet-half, c. parallel, strongly oblique, slightly arching, some of the secondary lateral veins forming trabeculate anastomoses; reticulation prominulous above, prominent beneath. Inflorescences terminal and axillary at the distal leaves, yellowish sericeous in the distal parts, glabrescent, consisting of pedunculate glomerules aggregated into panicles, c. 50 by 30 cm; glomerules consisting of 2-6 (sub)sessile flowers; floral bracts orbicular, obtuse 0.5-1 mm, sericeous. Flowers pentamerous, bisexual. Calyx yellow or yellowish-green, broadly campanulate, 1.5-2(-4) mm, scarcely sericeous; teeth triangular acute, 0.5-1 mm. Corolla yellow or yellowish-green, campanulate, 4.5-5(-9) mm, sericeous; lobes elliptic-lanceolate, acute, reflexed, 2-2.5(-4) mm. Siamens white, c. 6 mm, tube equalling the corolla-tube. Ovary solitary, glabrous. Pod yellowish or red-brown outside, reddish-orange within, curved into a circle 4.5-8 cm in diameter, valves 2-3.5 cm wide, coriaceous, not sinuate, often spirally twisted after dehiscence, glabrous, inconspicuously veined, dehiscing along both sutures. Seeds black with a bluish bloom, ellipsoid, c. 17-21 by 10-11(-15) mm.

Ecology
Primary and secondary rain forest, common at forest margins and along rivers and creeks; soil sandy or clayey, brown or black, but also on or near limestone; altitude 0-600 m.

Uses
Roots used as fish poison. The wood is locally used for construction purposes. Pounded leaves used against lice.

Distribution
Nicobar Islands, Thailand, Peninsular Malaysia, Sumatra, Java, Borneo, Philippines.

Local names
Borneo: Indelebah, Jaring, Jering-jering, Langir antu.