Short-stemmed, perennial, mat-forming herbs, with long, ± leafy runners rooting at nodes, not armed. Lvs in basal rosettes, in clusters (sometimes singly) scattered along runners and cauline, long-petiolate, pinnately 3-foliolate, dentate or crenate; stipules adnate below, conspicuous, persistent. Fls solitary, ☿, small- to medium-sized, borne on long, slender scapes arising from basal rosettes or in axils of runner lvs. Hypanthium with a central convex, somewhat spongy receptacle (carpophore). Epicalyx segments leafy and toothed. Calyx usually with 5, ± triangular, toothed sepals about = epicalyx segments. Petals 5, ± obovate, yellow. Stamens 20-30. Ovary superior; carpels numerous; styles numerous, surrounded by hypanthium rim; ovules 1 per carpel. Fr. a head of many achenes on surface of dryish, semi-fleshy, coloured receptacle, the styles deciduous at fruiting.