Heads mostly discoid; invol bracts appressed, in 2–3 equal series, at least the inner with broad, obtuse, scarious, somewhat petaloid, yellowish or whitish tip, ± herbaceous below; receptacle small, naked; disk-fls perfect, the cor yellow or whitish, with campanulate 4–5-lobed throat, the lobes mostly ovate; style-branches flattened, with very short, minutely hairy appendage; achenes ca 15–20-nerved and 4–5-angled; pappus of 12–20 membranous or hyaline small scales, or rarely wanting; herbs with alternate, pinnatifid lvs and several or many small or middle-sized, hemispheric or campanulate heads. 10, N. Amer.
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