Citation: L., Sp. Pl. 901 (1753).

Synonymy: Not Applicable

Common name: None

Description:
Annual or perennial herbs; leaves cauline, opposite to alternate, flat, petiolate, simple.

Capitula longpedunculate, terminal, solitary or in loose cymes, heterogamous, radiate; involucres hemispherical, becoming reflexed in fruit, 2- or 3-seriate; bracts numerous, subequal, herbaceous; receptacle convex, pitted, with deciduous scales; ray florets uniseriate, female and fertile or sterile, ligulate: disk florets bisexual, fertile, tubular, pentamerous: anthers obtuse at the base, with a narrow acute appendage at the apex: style branches linear, with shortly hairy subulate terminal appendages.

Achenes compressed, oblong to obovate, often winged: pappus of 2 awns or absent.

Distribution:  About 150 species in North and South America: 1 is naturalised in Australia.

Biology: No text

Author: Not yet available