Perennials, 20-60 cm (taproots often relatively massive; caudices unbranched or multibranched). Stems erect, seldom branched (usually white in age). Leaves mostly cauline (proximal scalelike); mostly alternate, sometimes opposite; sessile or nearly so; blades (mid and distal, usually 1 or ± 3-nerved, laterals weaker than midribs) narrowly oblong to linear, bases ± cuneate, margins entire, faces hispid to scabrous, glabrescent (then usually roughened by persistent hair bases). Heads radiate, borne singly (peduncles sometimes bracteate). Involucres hemispheric to turbinate, (13-)20-30(-40) mm diam. Phyllaries persistent, 30-45+ in 3-4+ series (subequal to unequal, outer often surpassing inner). Receptacles flat to convex, paleate (paleae conduplicate, papery). Ray florets (8-)10-18(-21), pistillate, fertile; corollas yellow. Disc florets 40-120+, bisexual, fertile; corollas yellow, tubes much shorter than cylindric throats, lobes 5, ± deltate (style branches stigmatic in 2 barely distinct lines, appendages filiform). Cypselae ± prismatic, (3-)4-angled (faces glabrous, smooth or finely honeycombed); pappi persistent, coroniform, ± lacerate. x = 19.