Perennial 4–10 dm from a rhizome with many fleshy vertical roots, usually unbranched; stem smooth or sparsely hairy; lvs coarse, irregularly serrate, usually sparsely hairy beneath, the lower long-petioled, ovate, rounded to subcordate at base, the upper progressively narrowed to lanceolate and often subsessile; infl strict, unbranched, secund, with much reduced bracts; sep and hypanthium glabrous to finely hairy; cor blue, somewhat nodding, 2–3 cm; 2n=102. A persistent weed in lawns, roadsides and waste ground; native of Eurasia, intr. from N.S. to Minn., s. to Del., Ky., and Mo. July, Aug.
A plant which keeps growing from year to year. It grows 30-60 cm tall. It forms large patches. The leaves have teeth along the edge. The flower stems are tall. The flowers are nodding and bell shaped. They are blue or violet. They are 20-30 mm long.