Tree 20-30 m. Inflorescence and flowers with persistent rough dense rusty hairs 1-1.5 mm; Leaves chartaceous or subcoriaceous, ovate-oblong or oblong-lanceolate, 14-33 by 5-12 cm, base cuneate, rounded, or subcordate, apex acute(-acuminate); Inflorescences between the leaves or below, of the Knema-typt, sessile or pedunculate; Fruits single, (ellipsoid-)oblong, 6-7 by 3.5-4 cm, apex narrowed, (sub)acute or shortly beaked, base ± narrowed, hairs dense, rust-coloured, 1-1.5 mm long;
Asia-Tropical: New Guinea present, Madang Prov present, Papua New Guinea present, W Sepik present, restricted area in NE Papua Barat present
Malesia: New Guinea (a limited number of collections known from a restricted area in NE Papua Barat and Papua New Guinea: W Sepik&Madang Prov.).
1 Myristica fusca is close to M. sphaerosperma and M. womersleyi; for differences, see the key to the species. 2 Myristica fusca is readily recognizable by its somewhat bullate leaves with coarse dark rust-coloured indumentum below and its comparatively large flowers.