Perennial or annual herbs, usually prostrate. Leaves mostly cauline, alternate, entire or toothed to pinnatisect. Capitula broadly cup-shaped or hemispherical, terminal or axillary, solitary, pedunculate; involucral bracts 2–several-seriate, subequal, herbaceous with scarious margins; receptacle flat to conical, naked. Florets on short persistent pedicels or sessile. Outer florets female, tubular, 1–4-seriate; corolla inflated, as wide as ovary at anthesis; style branches linear. Inner florets functionally male, sterile, tubular; corolla narrow-campanulate, 4-lobed, yellow; anthers obtuse or acute at base, with an ovate or lanceolate apical appendage; style terminated by a circular disc. Cypselas subglobose, angular or compressed, often winged, glabrous; pappus absent.
33 species, mostly from New Guinea, Australia, New Zealand and South America; 4 species in Australia, all endemic.