Annual or perennial herbs, subshrubs or shrubs, usually with stellate hairs. Leaves entire or rarely shallowly 3-lobed; stipules usually filiform to linear. Flowers solitary or clustered, sometimes on short axillary branches, often aggregated into terminal and lateral panicles. Epicalyx absent. Calyx 5-lobed. Petals mostly yellow, united at the base and adnate to the base of the staminal tube. Ovary of (5–)10–40 3–9-ovulate free carpels around a central axis; style-branches as many as the carpels. Fruit a subglobose to flattened schizocarp; mericarps usually dehiscing apically along the ventral suture, 1–3(–9)-seeded. Seeds reniform to globose, glabrous to tomentose, smooth to warted.