Subshrubs. Stems ca. 30 cm, glabrous. Petiole 0.9-2.1 cm; leaf blade ovate to narrowly elliptic or narrowly oblong, 5-10 X 1.4-4.5 cm, leathery, glabrous, base rounded to broadly cuneate, margin denticulate to serrate or subentire, apex abruptly acuminate to obtuse; lateral veins 5-7 on each side of midrib, often obscure, flat. Cymes 1-4-flowered; peduncle 1.5-4 cm, glabrous; bracts linear to ovate or obovate, 4-5 X 1.2-3 mm. Pedicel 6-12(-20) mm. Calyx 5-sect from base; segments 0.9-1.2 cm, glabrous. Corolla purplish, ca. 4 cm, glabrous; tube slender funnelform, ca. 3 X 1 cm; adaxial lip ca. 5 mm; abaxial lip 1-1.3 cm. Stamens ca. 1.6 cm; filaments ca. 1.5 cm; anthers oblate; connective appendages hornlike, 0.5-1.5 mm; staminodes 2, 8-10 mm. Disc ringlike, margin entire. Pistil ca. 2.3 cm, glabrous. Capsule 5-6 cm. Seed appendages hairlike, 0.9-1.2 mm. Fl. Jul-Sep, fr. Jul-Oct.
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