Description: Herbaceous and often woody at base or shrubs or small trees, much-branched.
Leaves alternate, simple, margins palmately lobed or entire, reducing in size along stem, lamina mostly broad and palmately veined or sometimes elongate and pinnately veined; petiolate.
Heads in terminal and axillary corymbose panicles; involucral bracts 1-seriate with small bracteoles present at base of involucre; receptacle ± flat, without scales. Heads with numerous florets, yellow or rarely white; florets radiate and tubular, outer unisexual, inner bisexual. Anthers tailed with sterile basal auricles. Style branches filiform.
Achenes ± terete, ribbed, glabrous; pappus of slender hairs, not persistent.
Distribution and occurrence: World: 48 species, Mexico & C America. Australia: 1 species (naturalized).
Text by G. J. Harden
|One species in NSW: Roldana petasitis|