Root carrotlike, 7-8 × 1.5-1.6 cm. Stems often single or sometimes 2 from one root, up to 1 m tall, simple, usually hirsute. Cauline leaves sessile or shortly petiolate; blade ovate-orbicular, ovate, obovate, or elliptic, 3-9 × 1.5-6.5 cm, abaxially rather densely hirsute (sometimes only along veins), adaxially scaberulose, base cuneate, margin serrate or irregularly biserrate, apex acute or acuminate; petiole if present up to 2 cm. Inflorescence a narrow panicle with short branches or a pseudoraceme of several flowers; pedicels short. Hypanthium campanulate, glabrous or rather densely hispidulous; calyx lobes narrowly triangular, 5-7 × 1-1.5 mm, margin with 1-4 pairs of denticles. Corolla blue or pale blue, funnelform-campanulate, 1-2.4 cm; lobes ca. 1/2 as long as tube. Disk shortly tubular, less than 1 mm. Style slightly longer than corolla to obviously exserted. Fl. Aug-Oct. 2n = 34.
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