Plants glandular hairy. Roots cylindric, 1-2.5 cm in diam. Stems 4-30 cm, partly underground. Petiole of upper leaves 2-5.5 cm; leaf blade elliptic, ovate, or spatulate, 10-17 × 1-4.5 cm, glandular hairy, glabrescent, remaining ciliate, base acuminate, margin entire, sinuate, or dentate, apex obtuse. Peduncle axillary, 2-3 mm. Pedicel 5-10 mm. Calyx ca. 15 × 5 mm; lobes deltate, unequal, 1-3 × 1.5-3 mm, glandular hairy, ciliate. Corolla limb yellow or violet, tube purple, ca. 2.5 cm; lobes ovate, ca. 4 × 3 mm. Filaments ca. 0.5 mm; anthers ca. 1.5 mm. Style exserted. Fruiting calyx elliptic or ovoid, 8-13 × 4-6.5 cm, subleathery. Capsules 1-2 cm in diam. Seeds black-brown, ca. 3 × 2.5 mm. Fl. Jun-Jul, fr. Jul-Sep.
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