Shrub, up to 4 m high, branched. Branches 0.9 cm in diam., terete to slightly quadrangular, not winged; internodes 1.5-6 cm long. Leaves petiolate, evenly distributed; petiole 0.4-1 cm long; blade coriaceous to thickly coriaceous, dull above with conspicuous venation, obovate, suborbicular to elliptic, 1.8-7.2(-14.2) x 1.2-5.3(-11) cm, margin slightly to strongly recurved, apex rounded, sometimes mucronate, base rounded to cuneate. Inflorescence 1-8-flowered; bracts scale-like, ovate-triangular, 1-3 x 2-3 mm; pedicel 8-11 mm long. Flowers erect; calyx green, lobes narrowly ovate-elliptic, 15-22 x 7-11 mm, margin scarcely hyaline, apex acuminate; corolla green to brownish, salver-shaped, 25-30 mm long, 7-11 mm wide at mouth, lobes ovate, 9-12 x 3-4 mm, apex acute to long-acuminate; stamens reaching corolla mouth but not exserted, filaments ca. 4-5 mm long, straight, anthers yellow, linear-oblong, 2-4 mm long, straight to slightly bent; pollen exine coarsely reticulate; pistil not seen. Fruit erect, green, becoming brown with age, ellipsoid, 11-20 x 8-9 mm; seeds light brown, 0.7-1.5 mm in diam.
Guyana present present, Mt. Roraima present present, Southern America: Venezuela (Venezuela present), tepuis in Bolívar state present
Venezuela (tepuis in Bolívar state), Guyana (Mt. Roraima); 8 collections studied, of which 1 from Mt. Roraima in Guyana, Persaud 152 (NY) (GU: 1).