Description: Perennial, biennial or annual rhizomatous or tap-rooted herbs.
Leaves alternate, sessile, partially stem-clasping, entire, hairs glandular or cottony.
Heads solitary or several in a branched inflorescence, terminal, heterogamous, involucral bracts 8–12 seriate, rigid, opaque, yellow, white or pink, intermediate bracts longest, receptacle flat
Distribution and occurrence:
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