A perennial herbaceous plant from 10 to 45 cm, with a creeping rhizome branching. Stems ascending or prostrate and rooting, double row segmented soft downy hairs. Leaves 1.5-3 cm long and 1-2 cm wide, ovate, slightly cordate, wrinkled, the edges of the cut-crenate or toothed, hairy, sessile (except the bottom). Flowers in few-flowered hand coming out of the sinuses of two to four upper leaves. Bracts lanceolate or oblong. Calyx chetyrehrazdelnym, with lanceolate lobes, pubescent at the sides, ciliate, half the length of the corolla. Corolla usually bright blue, with a diameter up to 13 mm, rotate, with three wide round or kidney-shaped lobes and a (lower) ovate-oblong, 2-3 times is another. Stamens shorter than the corolla, with white threads. Fruits — flattened boxes, 1.5-2 times as long as calyx, with numerous flat seeds. It flowers from April to August, the fruits ripen in July-September.
Plant with extensive habitat, stretching from Western Europe through the whole of Central and Eastern Europe to eastern Siberia. In our country grows in the European part, the Caucasus, Dagestan, Western Siberia, and perhaps as an introduction to some points in Eastern Siberia and Sakhalin. In Central Russia — A common plant in all areas.
Found in meadows, thickets, forests, boundaries, in the villages, in the railway embankments. Often winters with green leaves. In the bleached areas form patches.