Tree c. 15 m. Leaves membranous, elliptic-oblong, 15-29 by 5-9.5 cm, base attenuate, apex acute-acuminate; Inflorescences among or below the leaves, with sparse hairs c. 0.1 mm or less;
Aru and Tanimbar Islands present, Asia-Tropical: Maluku (Maluku present), SW Papua Barat present
Malesia: SW Papua Barat; possibly also Moluccas (Aru and Tanimbar Islands, see note).
Specimens perhaps to be included in H. aruana are Buwalda 4969 from the Aru Is. and bb 24414 from the Tanimbar Is.; the male flowers of both are immature. The synandrium of Buwalda 4969 is cleft to c. 1/10 only; however, in bb 24414 it appears cleft nearly 1/4 or 1/5; the irregular whitish blotches on the leaves are similar to those usually found in H. irya and H. smithii.