Treelet 5 m. Leaves thinly chartaceous, ± oblong-lanceolate, 8-13 by 1.5-3.5 cm, base short-attenuate, apical part narrowed into long acute-acuminate apex; Inflorescences between the leaves, with slender peduncle, paniculate, late glabrescent, hairs woolly, 0.5 mm long or less; Fruits solitary, on long slender stalk, presumably pendulous, fusiform, 5-5.5 by 1.5(—2) cm, apex ± beaked, base narrowed into a 5-10 mm long pseudostalk, hairs dense, yellow-rusty, pilose, 0.2-0.4 mm and stouter straight hairs towards the apex and at the base of the pseudostalk;
Asia-Tropical, Milne Bay Pro v., Ruba Ruba subprov., at the junction of Ugat and Mayu Rivers, near Mayu I present, Papua New Guinea present
Malesia: Papua New Guinea (Milne Bay Pro v., Ruba Ruba subprov., at the junction of Ugat and Mayu Rivers, near Mayu I.); known only from the type.
According to the inflorescences M. pilosella links up with M. cornutiflora and M. olivacea. It is similar to M. cylindrocarpa, a lowland species also known only from a single fruiting specimen which differs in the shorter indumentum, leaf venation, shorter infructescences, and smaller fruits.