Herb or shrub, 1.5-3 m tall; the stems terete, erect, light green. Leaves peti-olate; the petiole amplexicaul; lamina obovate to obovate-elliptic, long-attenuate into the petiole, acuminate apically, mucronate, 6-24 cm long and to 7.6 cm wide, chartaceous to submembranous, the costa prominent, lateral veins in 2-3 pairs, strongly ascending. Inflorescences terminal and axillary, composed of 1-3 laxly-flowered, simple or compound dichasia; the peduncles 1.4-6 cm long, terete, the pedicels 0.8-2.7 cm long; the bracts opposite, lanceolate to sublinear, 2-3 mm long. Flowers 3.5-4.1 cm long; calyx 4-7 mm long, cupular, the lobes 2-3 mm long, ovate, carinate dorsally, narrowly acuminate and appearing long-mucronate at the apex, the margins membranous; corolla 3.5-4.1 cm long, tub-ular, the tube bright yellow, constricted at the base, expanding slightly toward the apex, the lobes ovate, 2.5-3.5 mm long, erect, dark green, short-acuminate at the apex; stamens exserted, the filaments inserted ca. 1/3 from the base of the corolla, filiform, 2.5-3.2 cm long, the anthers ca. 2.5 mm long, bilobate at the
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base, inconspicuously mucronate apically; pistil 3.6-4.6 cm long, exserted, ovary narrowly ovate, 1-1.2 cm long, ca. 3 mm in diameter, the style exserted, the stigma capitate. Capsule fusiform, 1.5-1.9 cm long, beaked by the persistent style, the beak to 1.2 cm long; seeds irregular, ca. 0.5 mm long.