Perennials. Rootstock ± vertical, 2-5.3 mm in diam., not tuberculate, with thickened roots along rootstock. Stem 15-95 cm tall, erect or ascending, not rooting at nodes, with 0.3-1 mm patent or retrorse nonglandular trichomes. Stipules lanceolate to subulate, distinct. Leaves opposite; petiole with 0.3-1.5 mm patent to retrorse nonglandular trichomes; leaf blade 1.7-5.8 cm, palmately cleft, ratio of main sinus/middle segment length = 0.83-0.92, pilose with appressed nonglandular trichomes; segments 5, narrowly rhombic, 3.2-5.5 mm wide at base, 7-14-lobed in distal half, ratio of second sinus/middle segment length = 0.18-0.28. Cymules solitary, 1(or 2)-flowered; peduncle (0-)0.9-8.8 cm. Pedicel 1.8-3.5 cm, with 0.2-0.8 mm patent to retrorse nonglandular trichomes; bracteoles linear-lanceolate. Sepals 3.7-6.4 mm, mucro 0.9-1.6 mm, ratio of mucro/sepal length = 0.17-0.34, outside with 0.2-1.1 mm patent to antrorse ± appressed nonglandular trichomes, inside glabrous. Petals white or pink with purplish veins, 4-5.4(-5.8) mm, erect to patent, both surfaces glabrous, margin basally ciliate, apex rounded or slightly notched. Staminal filaments yellowish, lanceolate with an abruptly narrowed apex, both sides glabrous but proximal half ciliate with 0.1-0.3 mm trichomes; anthers bluish, 0.3-0.7 mm. Nectaries 5, hemispheric, glabrous. Stigma yellowish. Fruit 1.4-1.9 cm, erect when immature; mericarps smooth with 1 transversal vein at apex, with a basal callus, with 0.1-1.5 mm ± patent nonglandular trichomes; rostrum 0.8-1.4 cm, with a 0.4-1 mm narrowed apex; stigmatic remains 0.8-1.3 mm. Seeds 2-2.8 mm. Fl. Jun-Jul, fr. Jul-Aug. 2n = 28.
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Annual or short-lived perennial; stems weak, spreading to erect, to 1 m, villous; cauline lvs reniform, 4–7 cm wide, palmately 3–5-cleft, the segments coarsely toothed or lobed, chiefly above the middle; peduncles with 1 or occasionally 2 fls, on villous pedicels; sep villous, 5–7 mm, shortly awned; pet upcurved, ± emarginate, scarcely surpassing the sep; mature fr, including the cal, 15–20 mm, the stylar beak ca 1 mm or less, the carpel-bodies finely pubescent on the sides, pilose on the back. Native of Asia and e. Russia, intr. here and there in our range. Aug., Sept.
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