Stem erect, simple or slightly branched, 10-50 cm in height, pubescent with bristles. The leaves are lanceolate, the lower ones are on petioles, the upper ones are sessile, wavy along the edge, sharp or obtuse, covered with bristles, sitting on short tubercles. Inflorescence is a curl located at the ends of the stems and their branches. The calyx is deeply 5 separate, with a short, bristly peduncle.Calyx lobes linear-lanceolate, with white bristles at margins. Corolla white, with a tube bent in the middle and a bell-shaped limb, in the pharynx with shaggy scales. Nuts are reticulate-wrinkled, point-tuberous between wrinkles. Blooms from May to August. The maximum fertility of one plant is 900 nuts. Seedlings appear in early spring (April) and early autumn. Autumn seedlings overwinter in the south. The minimum germination temperature is 10-12 ° C.