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Plants 2–11 dm, usually glabrous below the infl; lvs 8–100 below the infl, the lowest ones 8–27 × 0.5–4 cm, the others rather abruptly reduced and becoming sessile; heads (1–)3–10(–35), evidently pedunculate to occasionally subsessile, the terminal one obviously the largest; invol 13–20 mm, broadly campanulate or hemispheric, glabrous, its bracts seldom much squarrose, with conspicuous, lacerate, scarious margins, seldom at all crisped, often purplish upwards; fls 30–100 per head; cor glabrous within; pappus barbellate; 2n=20. Mostly in damp, low places, occasionally in drier soil; Wis. to Alta., Colo., and N.M. Aug., Sept.
