Tree 30 m. Leaves thinly chartaceous, elliptic-oblong or obovate-oblong, 8-15 by (3-)5-7 cm, base shallowly cordate, rounded, or short-attenuate, apex bluntish or shortly acute-acuminate; Inflorescences (from infructescences) between the lower leaves, peduncle 15-20 mm, coarsely fissured and lenticellate. Male and female flowers not seen. Fruits (1 or) 2 or 3 per infructescence, ovoid-oblong, 6.7-7 by 4 cm, apex rounded, tip slightly oblique, ± blunt, base narrowed (pseudostalk absent), hairs mealy, dense, rusty, 0.1 mm;
Asia-Tropical, Papua New Guinea present, Western Prov., at Palmer River, 2 miles below junction with Black River present
Malesia: Papua New Guinea (Western Prov., at Palmer River, 2 miles below junction with Black River); known only from the type.
Myristica archboldiana is easily distinguishable from other members of the group of species with smaller leaves by its usually cordate leaves that are pubescent below, and its relatively long petiole and the thick-walled fruits. Sinclair (I.e.: 331) suggested a relationship with M. pedicellata and M. tenuivenia on account of the indumentum on the lower leaf surface and mode of venation, but these species have sessile scar-covered inflorescences.