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Annuals. Stem 9-37 cm tall, erect or ascending, not rooting at nodes, with 0.4-2.4 mm patent nonglandular trichomes, 0.1-0.3 mm uncinate nonglandular trichomes, and usually 0.2-0.4 mm patent glandular trichomes. Stipules lanceolate, distinct. Leaves opposite; petiole with 0.5-2.7 mm patent nonglandular trichomes, 0.1-0.3 mm uncinate nonglandular trichomes, and usually 0.2-0.3 mm patent glandular trichomes; leaf blade 1.3-6.7 cm, palmately cleft, ratio of main sinus/middle segment length = 0.63-0.83, pilose with ± appressed nonglandular and glandular trichomes; segments 5-7, rhombic, 3-11 mm wide at base, 3-19-lobed in distal half, ratio of second sinus/middle segment length = 0.14-0.29. Cymules solitary, (1 or)2-flowered, sometimes grouped at nodes with short or no peduncles; peduncle (0-)1-9.4 cm. Pedicel 0.5-2.2 cm, with 0.1-0.3 mm patent to uncinate nonglandular trichomes and usually 0.3-0.5 mm patent glandular trichomes; bracteoles lanceolate. Sepals 3.4-7.2 mm, mucro 0.2-1 mm, ratio of mucro/sepal length = 0.05-0.21, outside with 0.1-2.2 mm ± patent nonglandular trichomes and 0.3-0.6 mm patent glandular trichomes, inside glabrous. Petals purplish with a dark basal spot, 3.1-7.5 mm, erect to patent, both surfaces glabrous, margin basally ciliate, apex rounded. Staminal filaments white with dark purplish apex, lanceolate, glabrous; anthers purplish, 0.7-1.1 mm. Nectaries 5, hemispheric, glabrous. Stigma dark purplish. Fruit 1-1.7 cm, erect when immature; mericarps transversely wrinkled, without a basal callus, glabrous; rostrum 0.8-1.4 cm, without a narrowed apex; stigmatic remains 0.2-0.7 mm. Seeds 1.3-2.4 mm. Fl. Feb-Apr, fr. Apr-May. 2n = 56.
Leaf-lamina 5-lobed, divided to about 2/3; lobes 3–10 mm. across at base, obovate in outline, pinnatifid, pubescent both above and below, usually hispid with scattered hairs on the upper surface also; petioles 5–90 mm. long, longitudinally furrowed, covered with spreading hairs or glands; stipules 2–4 mm. long, lacerated nearly to the base into lanceolate segments, pubescent or pilose.
Inflorescence 2-flowered; peduncle 0–5 cm. long, glandular; pedicels 2–20 mm. long, glandular; bracts 2–4 mm. long, linear-lanceolate, hyaline at the edge, pubescent; sepals 5 × 2–3 mm., lanceolate, mucronate, 3-nerved, hyaline at the edge, pubescent, pilose or glandular.
Cocci with shallow reticulate ridges, glabrous or shortly pubescent; mature rostrum 8–14 mm. long, pubescent; upper portion of the styles 0–2 mm. long, stigmas 0·3–1 mm. long.
Annual herb; stems prostrate-ascendent, longitudinally furrowed, mostly covered with spreading hairs or glands up to 2 mm. in length.
Petals about 7 × 5 mm., obovate, purple-pink with distinct dark purple centre.
Stamens 10, filaments about 3 mm. long, narrowly lanceolate.
Seeds glabrous; testa minutely foveolate.
Ovary pubescent; stigmas 5.
