Tree 5-25 m. 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; Inflorescences with dense woolly hairs 0.3-0.5 mm; 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;
Asia-Tropical: Jawa (Jawa); Malaya (Peninsular Malaysia, Singapore); Sri Lanka (Sri Lanka present), Penang I
Sri Lanka; in Malesia introduced in gardens in Peninsular Malaysia (Penang I.), Singapore, and Java.
Horsfieldia iryaghedhi deviates from all other Horsfieldias, and can be placed in a separate section. It is distinguishable by the leaves being papillate beneath, the male flowers arranged in compact heads, and a many-lobulate stigma; according to Warburg (I.e.: 334) the seeds contain some starch, possibly unique for this species.
Formerly in Java a wax was obtained after cooking the fruits. The wood is moderately heavy and even-grained (see Sinclair 1975: 72).