Russia Flora: Plant up to 50 cm tall, with vertical rootstock (up to 3 cm long) and thin underground stolons (up to 20 cm long). Stems erect, glabrous, simple, rounded, weakly furrowed, without rosette leaves, rarely with 1-2 basal leaves on long petioles. Upper leaves on short petioles or sessile, with auriculate projections at base. Leaflets up to 4 cm long, 1.5-3 cm wide, oval-rhombic, with cuneate base, three-lobed, unequally dentate-serrate. Inflorescence umbelliform, with 3-9, rarely 1-2 flowers. Flower stalks 2-4 cm long, straight or slightly curved. Flowers up to 1.5 cm in diameter. Perianth simple, consisting of 5 white, elliptical tepals, cuneately narrowed at base. Fruit of 2-5 lanceolate, usually two-seeded carpels 4-7 mm long, 2-3 mm wide, with straight or more or less curved style. Seeds 1-1.8 mm in diameter, rounded-elliptical, densely transversely wrinkled, dark brown. (Table II).

Distribution: Lower Zeya, Bureya, Ussuri (central, south). (Figure 5). - In broad-leaved forests, on humus-rich soil. Flowering period: May-June. - General distribution: Japan-China. - Described from Khabarovsk: "Manchuria, at Amur River, Bureya Mountains. 1858. G. Radde (fl., frf.)" (type - LE).

Note: The species' range is sharply declining due to significant anthropogenic impact: habitat disturbance, collection of plants for bouquets. It is necessary to develop conservation measures and introduce it into cultivation.