Annual height of 10-45 cm, with a single strong stem, simple or branched, appressed-pubescent. The leaves are alternate, oblong, grayish from hairy-bristly hairs. Radical and lower cauline leaves narrowed into petiole, often spatulate, obtuse, the rest — sessile, 1.5-5 cm long and 3 mm wide, acute, flat or slightly revolute margins, top hairy-bristly, less hairy below. Individuals germinating in autumn, are rosette, germinating in the spring (vernal) sockets did not. The flowers are small, with very short stalks, with long bracts exceeding pedicels, clustered in few-flowered sparse curls, located on top of the stem in the form of a fork, with fruit curls longer. Calyx divided almost to the base into five shares of linear white hairs 3-5 mm long, in fruit growing strongly, its lobes are lanceolate-linear, splayed, do not cover the fruit. Corolla usually white or yellow, sometimes blue-violet, 4 mm long, with a long tube, calyx, and campanulate limb, half dissected into oblong obtuse lobes. Fruits are wrinkled, dull, brownish, coarsely tuberculate-folded and finely warty. Blooms in May and August, fruits from July.
Eurasian species, distributed in temperate zones of Europe and Asia from the Mediterranean to Japan. In our country grows almost throughout, except for the Arctic. In Central Russia is found in all areas of the southern — much more often.
It grows on dry slopes, wastelands, roadsides, waste places, young deposits, fields, gardens.
Segetal weed that has winter and spring forms Weed of grain, clover, lentils and other crops.