Cremastosperma megalophyllum R. E. Fr.

Tree or shrub 3–15 m tall, 2–15(–35) cm diam.; young twigs and petioles glabrous. Leaves: petioles 5–22 by 1.5–9 mm; lamina obovate to elliptic or narrowly so, 13–57 by 3–26 cm (index 2–5.1), chartaceous to coriaceous, shiny on both sides, secondary veins often impressed above (giving slightly bullate appearance), (dark) greyish-green or brown above, more brown or green below, glabrous on both sides, base obtuse to rounded, rarely acute or decurrent, apex acuminate (acumen (5-)10–30 mm long), primary vein conspicuously grooved in basal half, 1–5 mm wide at widest point, secondary veins (5–)8–21, intersecondary veins often 1–2(–3), distance between from 5–25 mm at the base to 9–35(–43) mm closer to the apex, angles with primary vein from (30–)45–70(–80)° at the base to (30–)40–75° closer to the apex, rarely branching, forming distinct loops, smallest distance between loops and margin 1–5 mm, tertiary veins percurrent. Inflorescence of single flowers, solitary or clustered in groups of up to 3, on leafy or leafless twigs or on the main trunk; short axillary shoot, 4–7(–8) by 0.7–1 mm (in flower), 4–10 by 1.5–4 mm (in fruit), glabrous or sparsely covered with whitish appressed hairs to 0.1 mm long; pedicels 10–20(–32) by ca. 1 mm at the base, up to 2(–2.5) mm at the apex (in flower), 15–30(–40) by 1.5–3 mm at the base, up to 4 mm at the apex (in fruit), glabrous; 3 lower bracts, deltate, ca. 1 by 1 mm, acute, soon falling off, sparsely covered with whitish appressed hairs to 0.1 mm long or glabrous; upper bract attached in apical half of pedicel, broadly ovate, 1–3 by 1–2 mm, obtuse, glabrous; closed flower buds depressed ovoid, opening loosely in development; flowers green maturing to yellow in vivo, black in sicco, sepals and petals glabrous; sepals free or connate for 1 mm, broadly ovate to triangular, appressed, open and conspicuous whilst petals still closed in young buds, 4–6 by 4–6 mm, obtuse to acute, sometimes briefly or partly persistent; outer petals broadly elliptic, 11–18 by 9–15 mm, obtuse, inner petals obovate, 10–16 by 5–7 mm, obtuse; androecium diam. unknown, stamens 1.3–1.8 mm long, connective appendage 0.7–1 mm wide; gynoecium diam. unknown, carpels 1.5–2 mm long. Monocarps 6–32, ellipsoid to broadly ellipsoid, (slightly) asymmetrical, 12–20 by 9–14 mm, green maturing to yellow, orange, purple and black in vivo, reddish or dark brown or black in sicco, often with an excentric apicule; stipes 10–30 by 1–2 mm; fruiting receptacle 3–12 mm diam.; monocarps, stipes and receptacle glabrous. Seeds broadly ellipsoid, reddish-orange, pitted, ca. 12 by 9–10 mm, raphe raised (more so when seeds immature), regular.

Amazonian Colombia (Caquetá, Putamayo), Ecuador (Morona-Santiago, Napo, Pastaza, Sucumbíos, Zamora-Chinchipe) and Peru (Amazonas, Loreto).