Annual to perennial herbs or undershrubs. Leaves usually palmately 3-5-lobed or partite; stipules linear or filiform, caducous. Flowers axillary, solitary or in terminal racemes by the reduction of leaves. Epicalyx segments 4 to many, up to 16, free or connate at base, persistent or caducous. Calyx adnate to corolla, lobed or toothed, irregularly splitting into 2(-3) lobes during anthesis, spathaceous, caducous. Corolla usually yellow with a dark purple centre, falling along with calyx and staminal tube. Staminal column included, antheriferous all over. Carpels 5; ovary pubescent, 5-loculed. Fruit loculicidally dehiscent capsule, oblong or cylindric. Seeds many in each cell, glabrous or hairy.