Horsfieldia tuberculata Warb.

Tree 5-20 m. Twigs faintly ridged or not, 2-4(-6) mm diameter, early glabrescent, hairs (rarely ± woolly) 0.1-0.3 mm; bark striate, not flaking; lenticels sparse and small, sometimes almost absent. Leaves membranous (or on higher altitudes subchartaceous), elliptic to oblong-lanceolate, 12-25(-40) by 3-10(-16) cm, base short-to long-attenuate, rarely rounded, apex acute-acuminate; upper surface drying dull (greenish) brown, often minutely pustulate, lower surface early glabrescent, hairs 0.1 (-0.3) mm; dots absent; midrib flat or ± sunken above; nerves 11-22 pairs, above thin, flattish or sunken above, lines of interarching not very distinct; venation fine, distinct or not on both surfaces; petiole 8-18 by 1.5-3(-5) mm; leaf bud 10-15 by 2-3 mm, with hairs 0.1-0.3 mm long. Inflorescences with sparse stellate-dendroid hairs 0.1-0.3 mm long, sometimes ± glabrescent; in male 1-3 times branched, 3-15(-22) by 2-10 cm, peduncle 0.5-2.5 cm long; female to 7 cm long; bracts 0.5-3 mm long, caducous; flowers solitary or in loose clusters of 2-4, perianths 2-(or 3-)lobed, glabrous (early glabrescent), pedicels glabrous or rarely sparingly pubescent, sometimes ± articulated. Male flowers: pedicel (somewhat) tapering, 2-5(-6) mm; buds laterally compressed, short-pear-shaped, about as long as broad to slightly broader than long, (1.5—)2—3.5 by 2-4 mm, apex broadly rounded, the lower 1/3-1/2 narrowed into the pedicel, cleft 1/2-3/4, lobes 0.2 mm thick; androecium ± flattened, apex broadly rounded to subtruncate, 1.5-2.5 by 2-3 mm (Plate 2: 33); thecae 24-40, erect, not inrlexed, free apical parts up to 0.2 mm long; column narrowly hollowed for 1/5-1/3; androphore up to 0.2 mm long. Female flowers: pedicel 1.5-2.5 mm long; buds subglobose, 2-3 by 2-3.5 mm, cleft 1/2-2/3; ovary subglobose, glabrous, 1.5-2 by 1.5-2 mm; stigma sessile, faintly 2-lobed, 0.2 by 0.5-1 mm. Fruits 5-15 per infructescence, ellipsoid, apex rounded or slightly pointed, 1.5-3.7 by 1.1-2.5 (-3) cm, glabrous, drying blackish brown, with sparse, small to coarse, paler lenticel-like tubercles; pericarp 1-8 mm thick; fruiting pedicel 3-10 mm; perianth not persistent.

It is a tropical plant.