Stems ascending, slender, ca. 35 cm tall, simple, densely hirsute below, glabrous above. Basal leaves long petiolate, hirsute; blade ovate, ca. 3 cm wide, abaxially sparsely hirsute along veins, adaxially hirsute, base cordate with sinus up to 4 cm deep, margin sinuate-crenate or serrate; petiole ca. 3 cm. Lowermost cauline leaf similar to basal leaves but slightly smaller; petiole ca. 2 cm. Upper cauline leaves only 2-4, less than 1 cm, linear, sessile. Cymes 2 or 3, lax, with only terminal flower; bracts filiform, minute; pedicels slender. Hypanthium obovoid, glabrous; calyx lobes subulate, 2-3 × ca. 0.5 mm, margin entire. Corolla narrowly campanulate, ca. 1.8 cm; lobes narrowly ovate-elliptic, equaling tube, ca. 4 mm wide, apex acute. Disk annular, less than 0.5 mm high. Style ca. 12 mm. Capsule oblong or obovoid, 5-7 × 3-4 mm. Fl. Aug-Sep, fr. Sep.
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