Stems erect, 20-100 cm tall, simple, sparsely retrorsely hirsute. Cauline leaves all or only lower and middle leaves petiolate; blade ovate or ovate-lanceolate, 2-5 × 1-2 cm, abaxially hirsute along veins, adaxially sparsely puberulent, margin pinnatifid or rarely only dentate-lobed; petiole 0.5-2.5 cm. Inflorescence with slender and ascending branches, forming a panicle, or several flowers in a pseudoraceme, rarely flowers solitary and terminal; pedicels slender, 5-20 mm. Hypanthium oblong or obovoid, base obtuse or rounded, glabrous; calyx lobes subulate, 3-4 × less than 1 mm, margin with 1 or 2 pairs of verrucose denticles, rarely ciliate. Corolla blue or purple-blue, campanulate, 11-17 mm; lobes ovate-deltoid, 4-6 mm. Disk tubular, 2-3 mm, sparsely puberulent above. Style nearly as long as or slightly longer than corolla. Capsule cylindrical, base rounded, 6-8 × ca. 3 mm. Seeds yellow, ellipsoid, ca. 0.8 mm. Fl. Jul-Oct, fr. Aug-Oct. 2n = 34*, 34+2B*.
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