Erect, usually glabrous annual or perennial herbs, with a slender taproot, or sometimes with several thick roots. Leaves 1–3-pinnatisect or ternately dissected; petiole sheathing at base. Inflorescence terminal or axillary, a compound umbel; bracts numerous, entire or pinnatisect; rays numerous; bracteoles numerous, entire; pedicels spreading. Flowers bisexual; sepals minute or absent; petals ovate to obcordate, apex inflexed, 2-lobed; nectary depressed-conical. Fruit ovoid to oblong, laterally compressed; mericarps filiform, acute, 5-ribbed, pale; carpophore persistent, entire or bifid to base.
About 10 species, from southern Europe, western Asia and tropical Africa; 2 species naturalised in Australia.