River gravilat, stream gravilat, or brute gravilat (Latin Geum rivale). A perennial herbaceous plant. The rhizome is thick, brown, creeping, covered with the remains of leaves. The stem is erect, simple or slightly branched at the top, shaggy, glandular in the upper part, usually dark red, 25-80 cm high. Leaves are pressed-hairy; basal-on long petioles, intermittently-unpaired, with a large reniform-rounded, three - or five-incised lobe and two or three pairs of small obovate double-toothed lobes; stem leaves are short-stemmed or sessile, three-divided, with small ovate stipules. The flowers are bisexual, bell — shaped, five-membered, drooping (erect after flowering), up to 1-1.5 cm in diameter,including two or three (five) on the top of the stem, on long peduncles, with a double perianth; the calyx is brownish-red; the petals are wide, blunt, notched at the top, suddenly narrowed into a long nail, equal in length to the sepals, cream, less often yellow, with dark red veins, glandular-shaggy. The sepals are erect. The stamens are numerous, hairy. Numerous pistils are collected in an egg-shaped head, sitting on a pubescent leg, lengthening when the fruits ripen. The upper segment of the column is hairy to the very top and is almost equal to the lower one. The flower between the stamens is a solid nectariferous tissue. Blooms in late spring and the first half of summer for 15-20 days. The fruit is a red achene, ends with a hook formed by the hairy lower segment of the column remaining with the fruits and lengthening. Fruits with the help of this hook are distributed by humans and animals. The fruits ripen in July — August. It grows on moist and moist fertile, slightly acidic soils, in deciduous forests, along the banks of rivers and the edges of swamps, in meadows, in thickets of shrubs.