Herbs 0.5-1.5 m tall, annual. Stem glabrous or apically glandular hairy. Lower stem leaves with petiole 4-9 cm, slender cuneately winged, base not clasping; leaf blade triangular, triangular-ovate, or broadly lanceolate, 7-18 × 4-24 cm, usually undivided, glabrous or sparsely glandular hairy, base cuneate, truncate, cordate, or hastate, margin sinuate and mucronately dentate, apex acute. Middle and upper stem leaves with a shorter narrow to broader winged petiole; leaf blade with a rather cuneate base, undivided and otherwise similar to lower leaves or lyrately pinnatipartite to lyrately pinnatisect; lateral lobes if present 1 or 2(or 3) pairs, triangular-ovate to elliptic; terminal lobe triangular-ovate to lanceolate, apex acute. Uppermost leaves sessile, elliptic to narrowly rhombic, undivided, base narrow and not clasping, apex acute. Synflorescence narrowly paniculiform, with some to numerous capitula. Capitula with 4-6 florets. Involucre 10-11 × 1.5-2 mm. Outer phyllaries ovate-triangular to lanceolate, largest ca. 3 × 0.5 mm, apex acute; inner phyllaries 5, apex acute to obtuse. Florets purplish red to sometimes whitish. Achene ca. 4 mm, attenuate into an almost beaked apex. Pappus 5-6 mm. Fl. and fr. Feb-Aug.
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