Subshrubs. Stems erect, to 1 m, glabrous. Petiole 2-35 mm; leaf blade sometimes asymmetric, narrowly elliptic to elliptic-ovate or obovate, 4.5-13.6 X 2.2-8 cm, papery, glabrous, base sometimes oblique, cuneate to rounded, margin entire to repand, glandular, apex acuminate to abruptly acuminate; lateral veins 4-7(-9) on each side of midrib, flat to prominent below. Cymes 2-8-flowered; peduncle 1-2 cm, glabrous; bracts elliptic, ca. 5 X 2.5 mm. Pedicel 2.5-4.5(-6) mm. Calyx 5-sect from base; segments 6-9 mm, glabrous. Corolla yellow to white, 1.7-2.1 cm, outside glabrous, inside sparsely glandular puberulent below; tube funnelform-tubular, 1-1.3 cm X 7 mm; adaxial lip ca. 4 mm; abaxial lip 7-8 mm. Stamens ca. 9 mm; filaments ca. 7.5 mm; anthers subglobose; connective unappendaged; staminodes 2, 2.2-3 mm. Disc ringlike, margin entire. Pistil 0.9-1.4 cm, glabrous. Capsule 5.4-10 cm. Seed appendages hairlike, 0.7-1.2 mm. Fl. Jun-Jul, fr. Jul-Nov.
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