Herbs 60-70 cm tall, perennial. Stem solitary, erect, apically with slender glabrous branches. Lower stem leaves with petiole 3-5 cm, basally widened; leaf blade narrowly elliptic, 14-17 × 5-8 cm, pinnatipartite, margin dentate; lateral lobes 6-9 pairs, ± rhombic to rarely triangularly hastate, base broadly petiolulate or sessile, apex acuminate; terminal lobe rhombic, hastate-rhombic, or triangular-hastate-rhombic, apex acute. Middle stem leaves similar to lower stem leaves but with fewer lateral lobes. Upper stem leaves similar to middle stem leaves but broadly triangular to broadly ovate, base broadly winged, petiole-like, and auriculately clasping, margin entire; lateral lobes 2 pairs, irregularly triangular-hastate, basally attenuate; terminal lobe irregularly triangular-hastate. Synflorescence paniculiform, with numerous capitula. Capitula ?nodding, with ca. 10 florets. Involucre cylindric, 8-10 × ca. 3 mm. Phyllaries abaxially glabrous, apex acute to obtuse; outer phyllaries narrowly triangular to linear-lanceolate. Florets yellow. Achene 4-5 mm; body dark brown, ellipsoid, compressed, lateral ribs broadened, apex contracted into a ca. 1 mm beak. Pappus double, outer hairs inconspicuous, bristles ca. 4 mm. Fl. and fr. Sep-Oct.
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