Madia
Aromatic annual or perennial herbs, usually densely glandular-pubescent. Leaves alternate, sometimes opposite below, entire or toothed. Capitula cupular, mainly in terminal racemes or panicles, sessile or pedunculate; involucral bracts 1-seriate, free, equal, herbaceous, deeply sulcate, as many as ray florets and completely enclosing them; receptacle flat, with 1 or 2 series of scales between ray and disc florets, united into a cup, often persistent. Ray florets 5–12, ligulate, female; ligule deeply 3(rarely 2)-lobed, yellow; disc florets tubular, bisexual, fertile or sterile; corolla campanulate, 5-lobed, yellow; anthers sagittate at base, with an acute ovate apical appendage; style with flattened branches. Ray cypselas obovate or clavate, more or less oblique, compressed with a sharp ventral angle; pappus minute or absent. Disc cypselas similar to those of rays, or less oblique; pappus of narrow scales or bristles, or absent.
About 18 species, from North and South America; 1 species naturalised in Australia.
Jeanes, J.A. (1999). Asteraceae. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 4, Cornaceae to Asteraceae, pp. 652–666. Inkata Press, Melbourne.