Archidendron triplinervium (Kosterm.) Nielsen, Opera Bot. 76 (1984)

Synonyms
Abarema triplinervia Kosterm.
Pithecellobium triplinervium (Kosterm.) Cockb.

Description
Tree (or shrub), 4.5-10(-26) m high; bole to 14 m high, 40 cm in diameter. Branchlets terete or c. angular in the distal part, yellowish grey to light brown, glabrous. Leaves: rachis 1.5-7.5 cm, glabrous, gland broadly to narrowly elliptic, flat or slightly cushion-shaped, often c. raised, 2-9 mm; pinnae 1 pair, 3.5-13.5 cm, glabrous; petiolules 2-7 mm, glabrous; leaflets 2 (or 3) pairs per pinna, opposite, coriaceous or chartaceous, drying grey-green or brown, c. equal-sided, ovate-elliptic to obovate-elliptic (or lanceolate), (4-)7.5-18 by (2.5-)4.5-8.5 cm, base symmetrically rounded or broadly cuneate, apex obtusely acuminate-caudate, both surfaces glabrous; principal lateral veins (1-) 2-3(-4) per leaflet-half, non parallel, strongly arching, issuing from the lower half of the main vein; reticulation lax, prominulous above, prominent beneath. Inflorescences terminal or ramiflorous below the leaves, scarcely puberulous, glabrescent, consisting of pedunculate glomerules aggregated into panicles, 30 by 35 cm; glomerules consisting of 2 or 3 sessile or subsessile flowers; pedicel less than 1 mm; floral bracts ovate, obtuse or obscurely dentate, c. 1 mm, glabrous. Flowers pentamerous, bisexual. Calyx green, cup-shaped or campanulate, (1.5-)2.4-4.5 mm, glabrous; teeth deltoid, irregular, acute, 0.1-0.8 mm. Corolla yellowish green or white, funnel-shaped, 6-10 mm, glabrous; lobes elliptic, acute, (2.5-)3-4 mm. Stamens white, c. 25 mm, tube equalling or shorter than the corolla-tube. Ovary solitary, glabrous. Pod red or brownish outside, reddish orange within, curved into a circle 6-10 cm in diameter, valves 2.5-3.5 cm wide, coriaceous chartaceous, not sinuate, glabrous, veins inconspicuous, dehiscing first along the ventral suture. Seeds bluish black, ellipsoid, slightly flattened, c. 15 by 10 mm. [from Flora Malesiana]

Ecology
Primary and secondary rain forest, seasonally inundated forest; found on riverbanks and low and undulating terrains, occasionally on slopes and ridges; altitude 0-150 m, occasionally up to 1300 m. A montane, shrubby ecotype from poor soil has been found in Sabah.

Uses
Rubbed young shoots mixed with water have been used against malaria. Roots used to make handles for parangs.

Distribution
Borneo.

Local names
Borneo: Jaring, Jiring hantu, Jiring rimba, Kamonyang, Langir hantu.