Perennials. Rootstock ± vertical, 5.8-8.8 mm in diam., not tuberculate, with many fibrous roots. Stem 24-50 cm tall, trailing or ascending, not rooting at nodes, with 0.3-1.7 mm patent to retrorse nonglandular trichomes and sometimes scattered 1.4-2 mm patent glandular trichomes. Stipules broadly ovate, connate. Leaves opposite; petiole with 0.4-1.5 mm patent to retrorse nonglandular trichomes and sometimes scattered 1.5-2 mm patent glandular trichomes; leaf blade 3.8-7.2 cm, palmately cleft, ratio of main sinus/middle segment length = 0.75-0.86, pilose with appressed nonglandular trichomes; segments 3 or 5, rhombic, 0.8-1.4 cm wide at base, 9-17-lobed in distal half, ratio of second sinus/middle segment length = 0.14-0.23. Cymules solitary, 2-flowered; peduncle 3.3-15.3 cm. Pedicel 3.1-8.4 cm, with 0.2-1.5 mm patent to retrorse nonglandular trichomes and sometimes scattered 1.5-2.1 mm patent glandular trichomes; bracteoles broadly lanceolate. Sepals 6.4-10.1 mm, mucro 2.3-4.6 mm, ratio of mucro/sepal length = 0.24-0.58, outside with 0.3-1.2 mm antrorse ± appressed nonglandular trichomes, inside glabrous. Petals deep pink, purplish, or blue, (1.2-)1.4-2.2 cm, erect to patent, inside basally with trichomes, margin basally ciliate, apex emarginate with a 0.4-1.4 mm notch. Staminal filaments blackish at least at tip, lanceolate, base slightly dilated, abaxially pilose and proximal half ciliate, trichomes 0.3-0.6 mm; anthers black, 2.2-3 mm. Nectaries 5, hemispheric, abaxially glabrous, apex with a tuft of trichomes. Stigma blackish. Fruit 3-3.9 cm, erect when immature; mericarps smooth, with a basal callus, with 0.6-1.6 mm ± patent nonglandular trichomes; rostrum 2-2.6 cm, with a 2.9-4.6 mm narrowed apex; stigmatic remains 5-7.6 mm. Seeds 3.6-3.9 mm. Fl. Jun-Jul, fr. Aug-Sep. 2n = 26, 28.
Undergrowth in open forests and shrubberie, also in meadows and on open slopes; mainly at elevations from 1,600-3,300 metres, but occasionally ascending to 4,200 metres.
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