Stems to 60 cm, dark purple spotted, glabrous, branched, with 7 to many nodes. Petiole 0.5-4 cm; leaf blade ovate to elliptic, 3-10 X 1-4 cm, glabrous, base oblique, cuneate to rounded, margin repand-serrulate to subentire, apex cuspidate to acuminate, vermiform sclereids surrounding vascular bundles; lateral veins 5-8 on each side of midrib. Cymes (2 or)3-flowered; peduncle 6-12 mm, glabrous; involucre ca. 1 cm in diam., outside glabrous. Calyx ca. 2.5 cm, 5-lobed from above middle; lobes equal, ovate-triangular, 3-4 X 2-3 mm, outside and margin glabrous. Corolla outside white, inside purple spotted, 3.7-4.1 cm, outside sparsely glandular puberulent, inside with a ring of hairs 5-8 mm above base; tube 2.8-3 cm; adaxial lip 6-7 mm; abaxial lip 0.9-1.1 cm. Anthers ca. 2.5 mm; staminodes 2, ca. 8 mm. Pistil ca. 2.6 cm, glabrous. Capsule unknown. Fl. Dec.
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