"Spreading or ascending annual, branched from the base, 2–5 dm; basal lvs rotund or reniform, 2–5 cm wide, 5–9 cleft, the segments usually 3-lobed at the summit; upperlvs progressively reduced, the uppermost alternate; fls numerous; cal and pedicels densely glandular-puberulent and also hirsute; sep acute, 3–4 mm at anthesis; pet 5–7 mm, deeply notched; fr (including the cal) 9–13 mm, the stylar beak 2–5 mm, the carpel-bodies glabrous but usually with oblique, curved wrinkles; 2n=26. Native ofEurope and w. Asia, now widespread as a weed and found here and there in our range. Apr.–Sept."
Annuals. Stem 10-45 cm tall, erect or decumbent, not rooting at nodes, with 1-1.7 mm patent nonglandular trichomes and 0.2-0.5 mm patent glandular and nonglandular trichomes. Stipules lanceolate, distinct. Leaves alternate; petiole with 1-1.5 mm patent nonglandular trichomes and 0.2-0.5 mm glandular and nonglandular trichomes; leaf blade 0.9-4 cm, palmately cleft, ratio of main sinus/middle segment length = 0.5-0.75, pilose with appressed nonglandular trichomes; segments 5, obtriangular, 1.5-5 mm wide at base, 3(or 4)-lobed at apex, ratio of second sinus/middle segment length = 0.14-0.25. Cymules solitary, 2-flowered; peduncle 0.5-8 cm. Pedicel 0.5-1.5 cm, with 1-1.8 mm patent nonglandular trichomes and 0.2-0.5 mm patent glandular and nonglandular trichomes; bracteoles lanceolate. Sepals (1-)2.5-5.5(-6) mm, mucro 0.1-0.2 mm, ratio of mucro/sepal length = 0.03-0.1, outside with 1-1.5 mm patent nonglandular trichomes and 0.2-0.5 mm ± patent nonglandular and glandular trichomes, outside glabrous. Petals bright purple, 3-8.5(-10.5) mm, erect to patent, both surfaces glabrous, margin basally ciliate, apex emarginate with a 1-2.5 mm notch. Staminal filaments whitish, lanceolate, glabrous except proximal half with some 0.1-0.2 mm cilia; anthers purplish, 0.7-1.5 mm. Nectaries 5, hemispheric, glabrous. Stigma purplish. Fruit 0.8-1.4 cm, erect when immature; mericarps transversely wrinkled, without a basal callus, glabrous but with a few cilia at base; rostrum 6-11 mm, with a 1-3 mm narrowed apex; stigmatic remains 1-2 mm. Seeds 1.4-1.8 mm. Fl. May, fr. May. 2n = 26.
Annual herb, stems up to ±45cm long, decumbent or ascending, pilose with glandular and eglandular hairs. Stipules ovate, acute. Radical leaves tufted, petioles up to 250 mm long, pilose as the stem; blade up to 60 mm in diam., divided halfway or more to the centre into 5-9 lobes, lobes oblong-obovate, deeply 3-fid, both surfaces thinly pilose; cauline leaves similar but petioles progressively shorter and blade reduced. Peduncles opposite the upper reduced leaves eventually forming large compound cymes, usually 2-flowered, pilose with spreading hairs often gland-tipped. Pedicels similar to peduncles. Sepals ±2.5-4 x 1.5-2.5 mm, pilose. Petals ±3-7 x 2-3 mm, deeply notched, purplish-pink. Rostrum glandular-pubescent. Carpels transversely ridged, glabrous.