Shrub or tree, 3-6 m. Leaves membranous, elliptic or oblong, 7-18 by 3-6 cm, base short- to long-attenuate, apex acute- acuminate (in Hoogland 3523 2 cm caudate); Inflorescences with scale-like hairs 0.1 mm or less, among the leaves, delicate, 1 or 2 (or 3) times branched, lowest branch from near the base; Fruits 1 (or 2) per infructescence, broadly ellipsoid-ovoid, 1.3 by 1 cm (excluding pseudostalk), base broadly rounded, apex ± acuminate, beak 2 mm, with hairs 0.1 mm long, drying brownish, without lenticels;
Asia-Tropical, Northern Prov present, Papua New Guinea present
Malesia: Papua New Guinea (Northern Prov.).
Horsfieldia clavata is related to H. squamulosa and H. crux-melitensis which have a similar clavate androecium. Horsfieldia squamulosa differs in its slender, male pedicels. The pedicel, and hence the whole male flower of H. crux-melitensis is similarly club-shaped as in the present species, but about twice as large; its leaves are also larger and darker, and both male and female flowers have much thickened pedicels.