Stem erect, 25-70 cm tall, 3-5 mm in diam. at base, glabrescent. Basal leaves petiolate; petiole to 25.5 cm, slender, glabrous, base narrowly sheathed; leaf blade cordate-hastate or ovate-sagittate, rarely reniform, 4.2-11 × 8-10 cm, abaxially shortly pilose, adaxially glabrous, palmately veined, base broadly cordate, margin regularly coarsely dentate, apex acute or subrounded; sinus ca. 1/3 as long as leaf blade, broad; basal lobes orbicular or oblong. Middle stem leaves sessile, cordate, 4-7 × 5-9 cm, apex acute; sheath enlarged, 2-3 cm. Distalmost stem leaves only with enlarged sheaths. Synflorescence racemose, to 10 cm; leaflike bracts smaller distally, proximal ones lanceolate, to 4 cm, middle to distal ones linear; peduncles to 3 cm, shortly yellowish brown pilose. Capitula numerous; supplementary bracts linear, 6-10 mm. Involucre campanulate, 8-10 × 5-7 mm, outside glabrous; phyllaries 7-10, in 2 rows, oblong, 2-4 mm wide, apex acute; inner phyllaries broadly membranous at margin. Ray florets yellow; lamina oblong, 8-10 × 2-6 mm, apex rounded, denticulate; tube 3.5-5 mm. Tubular florets 7-10 mm; tube 3.5-5 mm. Achenes cylindric, 5-6 mm. Pappus pale yellowish brown, as long as tube of tubular corolla. Fl. and fr. Aug.
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