Herb or shrub, 1-2.4 m tall; the stems green, terete. Leaves petiolate; the petioles amplexicaul; the blade narrowly obovate, long-attenuate into the petiole and decurrent at the base, apically acuminate, to 12 cm long and 4 cm wide, subcoriaceous, the costa prominent beneath. Inflorescences terminal and axillary, open, composed of simple or compound, few-flowered dichasia; the peduncles to 4.5 cm long; the pedicels 1-2.5 cm long; the bracts opposite, 2-5 mm long. Flowers 2.8-3.2 cm long; calyx tubular, 7-9.5 mm long, the lobes narrowly ovate, slightly carinate, long-acuminate apically, 4-6.5 cm long and ca. 2-2.5 mm wide, + scarious along the margins; corolla bright yellow, 2.8-3.2 cm long, tubular, the lower 1/3 constricted, the lobes greenish-yellow, erect, triangular, acuminate, 4-5.5 mm long and ca. 3 mm wide; stamens included or short-exserted, the fila-ments filiform, inserted on the corolla tube ca. 1/3 way from the base, 19-24 mm long, the anthers ca. 3.5-4 mm long, sagittate at the base, mucronate at the apex, the mucro curved and ca. 0.3-0.4 mm long; ovary narrowly ovate, slightly and obtusely 4-angulate at the base, 6-7 mm long and ca. 1.5-2 mm in diameter, the style equalling the corolla tube to long-exserted, the stigma capitate, ca. 1 mm in diameter. Capsule fusiform, beaked (persistent style base), to 12 mm long.
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