Plants perennial. Roots thickened, carrot-shaped. Stems usually caespitose, erect, 10-50 cm tall. Basal leaves long petiolate, glabrous; blade ovate or broadly elliptic. Lower and middle cauline leaves long petiolate, glabrous; blade lanceolate, elliptic, or linear. Middle and upper cauline leaves sessile, glabrous; blade linear, 1.5-7 cm, glabrous, margin entire or sparsely denticulate. Hypanthium very narrowly oblong, 0.5-1.5 cm; calyx lobes filiform, (3-)7-18(-25) mm, usually longer than corolla. Corolla blue or blue-purple, 7-15 mm; lobes ca. 1/2 as long as tube. Capsule clavate, attenuate at base, 20-40 mm. Seeds brown-yellow, elliptic, slightly compressed, ca. 0.7 mm, smooth. Fl. Jun-Aug, fr. Aug-Sep.
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