Tree or shrub, 2-6 (-12?) m tall. Leaves unifacial, detaching readily, entire, 9-33 cm long, 8-75 mm wide, sickle-shaped to semi-obovate, usually falcate; edges flat and usually undulate (true margins obscure); surface longitudinally wrinkled, glabrous, glaucous. Conflorescence terminal, erect, paniculate with 3-8 primary branches, sometimes with up to third-order branching; secondary peduncles usually with blackish triangular bases; unit conflorescence cylindrical, 4-11 cm long, acropetal. Flowers acroscopic. Flower colour: perianth and style greenish white to cream, sometimes with a pink tinge. Perianth glabrous outside and inside (sometimes papillose inside in lower half). Nectary U-shaped. Pistil 16.5-21 mm long, glabrous; pollen-presenter oblique on style, obliquely conical. Follicle spherical to fat-lenticular, 16-23 mm long, glabrous, ±smooth, viscid when young.