Perennial herbs and small shrubs, glabrescent to hirsute. Leaves toothed, lobed or dissected, rarely entire. Inflorescence an irregularly compound or simple umbel; involucral bracts usually as many as rays; umbellules with 2–3 bracteoles. Flowers bisexual, white to pink or pale green; sepals conspicuous, c. ovate; petals narrow, apex usually inflexed; nectary 2-lobed. Fruit laterally compressed, oblong to c. orbicular; mericarps 5–9-ribbed, often some ribs prominent and incurved at base; carpophore free or adnate to mericarp junction.
20–23 species, all endemic to temperate Australia; all States except Northern Territory. The genus is currently under revision.