Herb or shrub, 0.2-2.0 m tall, the stems terete, green. Leaves distinctly peti-olate basally, the upper ones nearly sessile, the petioles amplexicaul; lamina ovate, attenuate into the petiole to rounded and decurrent at the base, long-acuminate apically, to 12 cm long and 4.8 cm wide, thin-chartaceous, the costa slightly prominent and the lateral veins prominulous beneath. Inflorescences terminal and axillary, dense, borne in simple or compound dichasia; the peduncles short to elongate and attaining 6.5 cm, angulate; the pedicels short, 2-5 mm long; the bracts similar to the leaves but much reduced. Flowers 3.5-4.5 cm long; calyx 11-13 mm long, the lobes united only ca. 2 mm at the base, narrowly ovate, conspicuously carinate dorsally, sharply acuminate at the apex, ca. 2.5-3 mm wide, the margins scarious; corolla pale yellow to yellow, 3.5-4.5 cm long, the tube narrowly infundibuliform, ? constricted at the apex of the calyx, the lobes ovate to narrowly ovate, long-cuspidate-acuminate, 1.2-1.5 cm long and 0.4-0.6 cm wide, erect; stamens exserted, the filaments inserted on the lower part of
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the corolla tube, ca. 5-7 mm above the base, filiform, 2.5-3 cm long, the anthers ca. 2.1-2.2 mm long, the uncinate apical mucro inconspicuous or wanting; ovary fusiform, 5-6 mm long, ca. 0.5-0.6 mm in diameter, the style short-to long-exserted, the stigma capitate. Capsule fusiform, to 1 cm long; seeds irregular, ca. 0.5 mm long.
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