Perennial herb, the (? annual) stem 0.7–1.5 m high, bearing both leaves and capitula, sparsely setose.. Leaves 8–9, sessile, elliptic to lanceolate in outline, pinnatilobed, 6.5–30 cm long, 1.5–7 cm wide, base narrowed (in radical leaves) to half-amplexicaul, the lobes obtuse, their margins minutely sinuate-dentate, apex apiculate, setose on the midrib and veins beneath.. Capitula many, in lax panicles; involucre cylindrical, 9–14 mm long; phyllaries 4-seriate, ovate to lanceolate, 2.5–14 mm long, glabrous except for the very apex.. Florets 9–12 per capitulum; corolla bluish white (not seen).. Achenes reddish brown, narrowly ellipsoid, 6.7–7.3 mm long (including beak), 3-ribbed on each side, beak ± 2 mm long, glabrous or nearly so; pappus white, 5–7 mm long.
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