Herbs 40-90 cm tall, annual. Stem apically densely glandular hairy. Basal leaves unknown. Middle stem leaves with petiole 3-10 cm, unwinged, basally not widened; leaf blade triangular-ovate, 6-8 × 5-7 cm, 3-lobed or 3-parted, base cordate, margin ± sinuate and mucronulately dentate; lateral lobes triangular-ovate to semiorbicular, somewhat smaller or ± equal in size to terminal lobe, apex rounded to acute; terminal lobe ± triangular-ovate, apex acute. Upper stem leaves with petiole shorter and ± winged; leaf blade triangular, smaller and less divided than in middle stem leaves or not divided, base cuneate, apex acuminate. Uppermost leaves lanceolate, triangular-lanceolate, or narrowly elliptic, pilose as upper stem, margin dentate or entire, apex acuminate. Synflorescence narrowly paniculiform, with some to many capitula. Capitula with usually 10-15 florets. Involucre 9-11 × ca. 3 mm. Outer phyllaries triangular-ovate to lanceolate, largest 2-3 × ca. 1 mm, apex acute; inner phyllaries 8, apex ± obtuse. Florets reddish. Achene ca. 4 mm, attenuate into an almost beaked apex. Pappus ca. 6 mm. Fl. and fr. May-Aug.
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