Small tree or shrub, up to 4 m high, branched. Branches 0.3-0.6 cm in diam., terete, not winged; internodes 4.5-9 cm long. Leaves petiolate, arranged along stem; petiole 0.8-1.4 cm long; blade membranaceous, elliptic, 10.3-18.1 x 3.2-7.2 cm, margin flat, apex acute to suddenly acuminate, base attenuate. Flowers solitary or in pairs; calyx yellowish green to green, 17-25 x 6 mm, lobes ovate, 6-11 x 3-5 mm, margin membranaceous, apex acute; corolla white or light green, funnel-shaped, 65-73 mm long, 10-19 mm wide at mouth, lobes ovate, 9-17 x 8-11 mm, apex acuminate, with darker tip; stamens not extending beyond corolla lobes, filaments 35-57 mm long, strongly bent towards apex, anthers white, elliptic, 3-4 mm long, bent after anthesis; pollen exine unknown; pistil ca. 58 mm long, ovary 8 mm long, style 50 mm long, stigma lobe elliptic, 4-5 x 4-5 mm. Fruit unknown.
Known only from the Akarai Mts. at the Guyanan-Brazilian border; 2 collections studied, of which 1 from Guyana (GU: 1).