Nephelium uncinatum Radlk. ex Leenh.

Tree, up to 25(-40?) m high, dbh up to 45 cm, with up to 1.5 m high buttresses. Twigs 2.5-4.5 mm in diam., puberulous, late glabrescent. Leaves (1-foliolate to) 3-7(-9, rarely up to 18)-jugate; petiole 3-9 cm long, 1-1.5 mm thick, terete; axes densely minutely hairy, rarely fully glabrescent; petiolules (l-)2-4 mm long, above broadly shal-lowly grooved with a strong median rib. Leaflets (narrowly) elliptic to obovate, sometimes slightly falcate, 4.75-11 by 1.5-3.5 cm, index 2.5-5(-6), pergamentaceous, above puberulous in the basal part of the midrib, to subglabrous, beneath sparsely hairy on midrib and nerves, in between minutely sericeous; domatia present; base acute, decur-rent; sides slightly curved; apex tapering to fairly abruptly acuminate, acumen short (to long), broad, obtuse (to acute); midrib above raised, nerves 3-8 mm apart, nearly patent, above prominulous, intercalated veins well developed, veins and vein-lets clearly different, coarsely reticulate, prominulous but rather inconspicuous on both sides. Inflorescences terminal or pseudoterminal and in the upper leaf axils. Sepals c. 25-50% connate, in male flowers 1-1.1 mm, in female ones 1.4-1.5 mm long. Petals absent. Disc in male flowers fairly strongly developed, the lobes protruding between the stamens, in female flowers less conspicuous, glabrous or with some hairs. Stamens 5 or 6. Ovary 2-celled, sometimes in the same specimen also 1-celled. Fruits ellipsoid to subglobular, 2.75-3 by 2-2.25 cm, glabrous, fairly sparsely set with thick warts taperining into or more abruptly terminated by an up to 7.5 mm long, filiform, curved appendage; wall coriaceous, 1-2 mm thick.

A mid-canopy tree in primary and sometimes old secondary forests, mainly on hill slopes and ridges on well-drained soils, rarely in swamp; mostly on sandy soils; at elevations up to 330 metres.

Uses In Kalimantan sometimes cultivated, probably for the fruits.

Plants are grown from seed.