Myristica crassa King

Tree 10-25 m. Twigs 3-7 mm diameter, dark brown or blackish, very early glabrescent, indumentum minute; older twigs not flaking; lenticels sometimes present, indistinct. Leaves chartaceous or thinly coriaceous, elliptic-oblong to oblong-lanceolate, (13—) 17— 40 by 4.5-13 cm, base rounded or cuneate, apex acute-acuminate, margin often somewhat revolute on drying; upper surface dark olivaceous, lower surface greyish (purplish) brown, glabrous or hairs scattered, scale-like, 0.1 mm or less; papillose; dots absent; midrib flat or slightly raised above, lateral nerves 13—18(—22) per side, at 45-80° to the midrib, sunken above, lines of interarching and venation indistinct; petiole 20-30 by 2-4 mm; leaf bud 8-14 by 3-4 mm, hairs appressed, 0.1 mm or less. Inflorescences 1-2 cm, among the leaves or below, hairs 0.1 mm or less, ± of the Knema-typt: sessile or pedunculate to 6 mm, stout, with 1-3 woody brachyblasts, rarely with a lateral branch to 5 mm; in male: with 10-30 flowers, buds of various sizes; bracts 1-1.5 mm, finely pubescent, late caducous; female inflorescences short, 2-5-flowered; flowers ± coriaceous, hairs less than 0.1 mm, sometimes late glabrescent. Male flowers: pedicel 5—12(—15) mm, bracteole (sub)persistent, sometimes ± lobed at apex, (2-)3-4 mm; buds ovoid or urceolate-oblong, 4.5-6 by 2.5-5 mm, apex narrowly rounded, base broadly rounded to subtruncate, not or but slightly angled at apex, cleft c. 1/3, lobes 0.3 mm thick. Androecium slender, 3-3.5 mm; androphore 0.7-2 by 0.3-0.5 mm, minutely pubescent in the lower 2/3 or towards the base only; synandrium ellipsoid-oblong 2 by 0.5 mm, thecae 6-10, sterile apex narrow, rather blunt or very faintly lobed, 0.3 mm. Female flowers: pedicel ± stout, 2 mm, bracteole caducous; buds ± ovoid, 4-5 by 3-4 mm, cleft c. 1/3, at anthesis curved outwards; ovary 3(-4) by 2-2.5 mm, minutely pubescent. Infructescences short. Fruits 1 or 2 per infructescence, broadly ellipsoid, 3.5-5.5(-6) by 3-4 cm, hairs rust-coloured, powdery (easily rubbed off), 0.1-0.3 mm; pericarp (7-) 10 mm thick; seeds ellipsoid, 3-3.5 cm; fruiting pedicel stout, 5(-10) mm.

A tropical plant. It grows in primary forests and along rivers. It grows between sea level and 600 m altitude.

Can be grown by seedlings.