Perennials. Rootstock ± horizontal, 0.9-1.3 cm in diam., not tuberculate, with thickened roots along rootstock. Stem 34-89 cm tall, erect, not rooting at nodes, with 0.3-0.8(-1.7) mm retrorse ± appressed nonglandular trichomes and sometimes 0.4-1.5 mm patent glandular trichomes. Stipules broadly lanceolate, connate at least at base. Leaves opposite; petiole with 0.3-0.6(-2.3) mm retrorse appressed nonglandular trichomes; leaf blade 4.2-12 cm, palmately cleft, ratio of main sinus/middle segment length = 0.76-0.9, pilose with appressed nonglandular trichomes; segments 5, rhombic, 5.1-11.1 mm wide at base, 9-25-lobed in distal half, ratio of second sinus/middle segment length = 0.06-0.2. Cymules solitary or in aggregates at apex of each branch, 2-flowered; peduncle (0-)1.7-8.2 cm. Pedicel 1.4-2.9 cm, with 0.3-0.5 mm uncinate nonglandular trichomes and 0.3-1.6 mm patent glandular trichomes; bracteoles filiform. Sepals 5.6-9.2 mm, mucro 0.8-2 mm, ratio of mucro/sepal length = 0.13-0.26, outside with 0.3-0.7 mm antrorse ± appressed nonglandular trichomes and 0.4-1.6 mm patent glandular trichomes, inside glabrous. Petals blackish red with a pale pink base, (6.7-)7-8.1(-9.3) mm, reflexed, both surfaces glabrous or rarely outside with a few trichomes, margin with sparse cilia, apex rounded. Staminal filaments dark red, lanceolate, abaxially sparsely pilose and proximal half ciliate, trichomes 0.2-0.4(-0.8) mm; anthers blackish, 2.1-2.5 mm. Nectaries forming a ring around flower, glabrous. Stigma dark red. Fruit 2.4-3 cm, nodding when immature; mericarps smooth, with a basal callus, with 0.4-1.7 mm ± patent nonglandular trichomes; rostrum 1.6-2.2 cm, with a 5.2-6.6 mm narrowed apex; stigmatic remains 1.9-2.5 mm. Seeds 2.7-3 mm. Fl. Jun-Jul, fr. Sep-Oct. 2n = 28*.
Home