Horsfieldia iryaghedhi Warb.

Tree 5-25 m. Twigs 2-5 mm diameter, early or late glabrescent, at first with woolly rust-yellow hairs 0.5 mm; bark coarsely striate or longitudinally cracking, rarely somewhat flaking; lenticels present, sometimes inconspicuous. Leaves chartaceous, ovate-elliptic to oblong-lanceolate, 10-28 by 4-12 cm, base rounded to attenuate, apex acute-acuminate, upper surface glabrous, drying dark brown or olivaceous, lower surface early or late glabrescent, papillose; dots absent; midrib late glabrescent, slightly raised above; nerves 9-16 pairs, flat or sunken above, lines of interarching fairly distinct; venation ± trabeculate, distinct to hardly visible above; petiole late glabrescent, 15-20(-25) by 2-3 mm; leaf bud 10-15 by 3-4 mm, with dense hairs 0.5 mm long. Inflorescences with dense woolly hairs 0.3-0.5 mm; in male: 6-15 by 4-10 cm, usually twice branched, the branches few, thickish, peduncle 0.3-2 cm; flowers in 10-25 subglobose dense clusters 5-10 mm diameter, spaced along the branches, each cluster with 80-100 (sub)sessile flowers; in female: smaller, little-branched, 1.5-4 by 1.5-2 cm, the flowers solitary or few together; bracts subtriangular to elliptic, the larger ones with distinct midnerve, 1-3 mm long, pubescent, caducous; flowers subsessile, perianth in male 3-(or 4-)lobed, in female 3-(or 2-)lobed, glabrous except at the base (hairs 0.2-0.5 mm), pedicel pubescent, not articulated. Male flowers: pedicel 0.2-0.3 mm long; buds narrowly ± obovoid-oblong or obconical, 3-5-(or 6-)angular, 2-2.5 by 1-1.6 mm, apex broadly rounded, gradually tapering to the base, cleft (l/4-)3/4, lobes 0.2(-0.3) mm thick; androecium elongate, narrowly obconical or ellipsoid-oblong, apex ± truncate, base tapering, 1-1.2 by 0.4-0.5 mm (Plate 1: 1); thecae 6-10, largely sessile, erect, free apices 0.2 mm, column narrow, hollow to halfway, androphore narrow, 0.2-0.5 mm long. Female flowers: pedicel up to 0.2 mm long; buds broadly ellipsoid, 3 by 2 mm, cleft c. 1/2; ovary broadly ellipsoid, 2 by 1.5 mm, densely short-pubescent, stigma minutely 2-4-(or more-)lobu-late. Fruits 3-8 in a cluster, ellipsoid or ellipsoid-oblong, 2.5-4.2 by 1.7-2.4 cm, with dense rust-yellowish stellate-dendroid hairs 0.5 mm, sometimes partly glabrescent; pericarp 1.5—2(—3) mm thick, not tuberculate; fruiting pedicel 0.5-2 mm long; perianth not persistent.

A tropical plant. It grows in dense forest along rivers. It grows in coastal regions and swamp forest. It grows up to 300 m above sea level.

UsesFormerly in Java a wax was obtained after cooking the fruits. The wood is moderately heavy and even-grained (see Sinclair 1975: 72).

Plants can be grown from seeds.