Perennial herbaceous plant, 30-80 cm high. Stem straight, slightly branched, slightly pubescent with gray hairs. The leaves are opposite, grey-green, pavement; the lower leaves are petiolate, oblong, entire, most often undissected; upper leaves sessile, pinnately dissected, with lanceolate leaflets. The flowers are blue-lilac, red-violet or purple, collected in an inflorescence – a head with a wrapper of a small number of green leaves. The calyx consists of small sepals of unequal size arranged in 2 circles; corolla four-lobed, fused into a tube, four-lobed at the top; stamens 4; ovary lower unilocular. The fruit is a one-seeded nut. A highly variable plant, especially with regard to leaves, corolla color, etc. It blooms in summer.
It occurs in grassy places, in light forests, among shrubs up to an altitude of 1500 m above sea level.
For medicinal purposes, the aerial part of the plant, collected with flowers in the initial stage of flowering, is used.
Korostavnik is recommended for use in chronic skin diseases, anal fistulas, itching in the anal area, as an expectorant for coughs and bronchitis, and inflammation of the bladder.
An infusion of 4 teaspoons of crushed raw materials, poured with 2 cups of boiling water, is used. 1 glass 2 times every day.
Application
Infusion: 2-4 teaspoons of herb per cup of boiling water for chronic skin disease, anal fistula, etc.