Stem erect, 50-100 cm tall, slender, 3-4 mm in diam. at base, proximally glabrous, distally and synflorescence white puberulent. Basal leaves petiolate; petiole 5-30 cm, slender, glabrous, base sheathed; leaf blade ovate-cordate, hastate, or sagittate, 3.2-10.5 × 4-15 cm, abaxially pubescent, adaxially glabrous, palmately veined, margin triangular-or sharply dentate and ciliate, apex obtuse or rounded, mucronate; sinus 1/4-1/3 as long as leaf blade, broad; basal lobes oblong, margin coarsely dentate, sometimes divergent. Middle stem leaves similar but smaller, shortly petiolate; sheath narrow, usually not amplexicaul. Distal stem leaves sessile, smaller. Synflorescence racemose, to 30 cm, proximally branched; leaflike bracts linear-lanceolate, 6-35 mm, margin entire; peduncles 2-8 mm. Capitula numerous; supplementary bracts linear. Involucre campanulate, 4-10 mm, mouth 4-8 mm in diam., outside glabrous; phyllaries 6 or 7, in 2 rows, oblong or lanceolate, 2-3 mm wide, apex triangular or acute; inner phyllaries membranous at margin. Florets all tubular, numerous, yellow, 6-7 mm; tube as long as limb. Pappus white, slightly shorter than tubular corolla. Fl. Jul-Sep, fr. Aug-Sep.
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