Perennials. Rootstock ± vertical, 6-11 mm in diam., not tuberculate, without thickened roots. Stem 28-45 cm tall, erect, not rooting at nodes, with 0.3-3.9 mm patent nonglandular trichomes and 0.7-1.8 mm patent glandular trichomes. Stipules ovate, distinct. Leaves alternate; petiole with 0.4-3.9 mm patent nonglandular trichomes and 0.6-1.8 mm patent glandular trichomes; leaf blade 3.7-8.4 cm, palmately cleft, ratio of main sinus/middle segment length = 0.66-0.73, pilose with ± appressed nonglandular and glandular trichomes; segments 5 or 7, obtriangular, 0.8-1.4 cm wide at base, 7-15-lobed in distal half, ratio of second sinus/middle segment length = 0.16-0.19. Cymules in loose umbel-like aggregates at apex of each branch, (2 or)3(or 4)-flowered; peduncle 2.5-6.7 cm. Pedicel 0.6-3.5 cm, with 0.4-3.5 mm patent nonglandular trichomes and 0.6-1.8 mm patent glandular trichomes; bracteoles linear-lanceolate. Sepals 6.1-7.6 mm, mucro 0.7-1.4 mm, ratio of mucro/sepal length = 0.11-0.18, outside with 0.3-3.2 mm patent nonglandular trichomes and 0.6-1.6 mm patent glandular trichomes, inside glabrous. Petals pinkish, 1.3-1.5 cm, erect to patent, both surfaces basally with trichomes but mainly inside, margin basally ciliate, apex rounded or retuse. Staminal filaments whitish, lanceolate, abaxially pilose and proximal half ciliate, trichomes 0.3-0.9 mm; anthers brownish, 0.9-1.6 mm. Nectaries 5, hemispheric, glabrous. Stigma reddish. Fruit ca. 1.8 cm, erect when immature; mericarps reticulate, without a basal callus, with 0.1-0.2 mm ± appressed nonglandular trichomes; rostrum ca. 1.2 cm, with a ca. 2 mm narrowed apex; stigmatic remains ca. 1.5 mm. Seeds not known. Fl. Jun-Aug, fr. Aug-Oct.