Stems 20-40 cm or more, purple spotted, glabrous, simple or branched, with 5 to many nodes. Petiole 1-4 cm; leaf blade elliptic to ovate, 7-17 X 3-9.5 cm, adaxially pubescent, abaxially glabrous, base slightly oblique, cuneate to slightly attenuate, margin entire to nearly entire, apex acuminate to acute, astrosclereids scattered in mesophyll; lateral veins 5 or 6 on each side of midrib. Cymes ca. 6-flowered; peduncle 7-10 cm, glabrous; involucre ca. 2 cm in diam., outside glabrous. Calyx 5-sect from base; segments equal, narrowly lanceolate, ca. 7 X 1.5-2 mm, outside and margin glabrous. Corolla outside white, inside purple spotted, 3.7-4.4 cm, outside sparsely glandular puberulent, inside with a ring of hairs; tube 2.9-3 cm; adaxial lip 5-9 mm; abaxial lip 0.8-1.4 cm. Anthers ca. 3 mm; staminodes 3, 1-9 mm. Pistil ca. 2.2 cm, glabrous. Capsule 2-2.5 cm. Fl. Nov-Dec, fr. Jan-Feb.
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