Tree, trunk 4-18 m high, to 40 cm diam., angled and fluted basally; buttresses ca. 40 cm high x 200 cm diam. x 10 cm thick; outer bark whitish or greyish, scaly or smooth. Leaves opposite, or sometimes opposite and alternate on same tree (Mori et al. 22686); petiole 1-4 cm long; blade subcoriaceous, glabrous, narrowly to broadly obovate, elliptical or oblanceolate, to 25-30 (-42) x (7.5-) 13.8 cm, apex obtuse to abruptly acute to shortly or tapering-acuminate, base acute or obtuse, margin sometimes undulate. Inflorescence cauliflorous, or sometimes borne terminally on branches (male flowers), or cauliflorous (female flowers), a many-flowered, lax, dichotomously branched cyme or panicle to ca. 15 x 8 cm; peduncle ca. 3-9.3 cm long, yellow; branches densely and minutely rufous-puberulent. Flowers unisexual, sometimes bisexual; perianth green or yellowish-green when young, rose at base when mature. Male perianth urceolate and generally wider than female perianth, to ca. 5 x 3 mm, sparsely puberulent outside, lobes somewhat ruffled, ca. 0.3-1 x 0.4 mm; stamens 6(9), filaments white, anthers pinkish-white or brown. Female perianth narrowly tubular, 4 x 1.5 mm (including lobes); style with stigma exserted ca. 0.5 mm beyond lobes. Anthocarp ovoid, subgloboid, oblongoid or ellipsoid, to 1.7 x 1.0 mm, glabrous, dark red or reddish-purple.
Amazonian Brazil present, Guianas present, Southern America: Peru (Peru present ‒ present)
Amazonian Brazil, Peru; in upland rainforest and forest-margins in the Guianas; 108 collections studied (18 from Peru), 90 from the Guianas (GU: 21; SU: 22; FG: 47).
Boni (French Guiana): mabechi; Creole (French Guiana): niamichi oudou; English (French Guiana): mapou, milukad kamwi; English (Guyana): humatuba; English (Suriname): marisiballi ojoto, njamsi-oedoe, prasara-oedoe