Relatively low perennial plant 15-30 cm tall. Herbaceous, with a creeping, jointed, rhizome seated with scaly leaves. Stem erect or ascending, tetrahedral in upper part, densely leafy. The leaves are opposite, lanceolate, pointed, sessile, at the base semi-amplexica and entire, further along the edges are finely serrate, with three-longitudinal veins. Flowers on long leaves emerging from the axils, peduncles; corolla with a yellow tube and a pink limb. Blooms in May-June.
It occurs in water meadows, damp sandy shores of reservoirs, in damp shrubs on sandy soil, near the Dnieper.
For medicinal purposes, the aerial part of the plant is used, which is called the avran herb. Raw materials are harvested during the flowering period.
The alcoholic tincture of the leaves has a similar effect on the heart as digitalis, although the glycoside gracialin and its aglucon graciogenia do not have this effect. Small doses of tincture increase the susceptibility of vision to green, and large doses, on the contrary, cause complete immunity to the green part of the spectrum. The roots have an emetic, laxative and diuretic effect.
All parts of the plant are poisonous and, when eaten by animals, cause severe diarrhea with blood and colic, vomiting, and at large doses, convulsions and collapse.
Herb powder is taken 0.2 g three times every day after meals. The highest single dose is 1 g, the daily dose is 3 g.