Height: 10–30 cm (4–12 in.). With many stems, stem ascending or sometimes erect, many-branched, bristly, short-haired–virtually glabrous, usually reddish.
Flower: Regular (actinomorphic), 4–6 mm (0.16–0.24 in.) broad. Petals 5, light purple, with shallowly notched tips. Sepals 5, hairy, tipless, same length as petals. Stamens 10, some without anthers. Pistil of 5 used carpels. Flowers usually in pairs, axillary or terminating stems.
Leaves: Basal rosette and on stem opposite or solitary. Rosette leaves long-stalked, stem leaves stalked–short-stalked, stipulate. Blade quite round, with palmate venation, very deeply 5–9-lobed; lobes on basal leaves often covering one another, blunt-tipped, often 3-toothed, teeth rounded.