Stem erect, robust, to 150 cm tall, 1.5-2 cm in diam. at base, densely shortly yellow pilose or glabrescent. Basal leaves petiolate; petiole to 70 cm, densely shortly yellow pilose, base narrowly sheathed; leaf blade reniform, 10-15 × 22-29 cm, both surfaces shortly pilose, palmately veined, abaxially with prominent reticulate veins, margin triangular-dentate, apex rounded; sinus ca. 1/3 as long as leaf blade, broad, basal lobes orbicular. Middle stem leaves shortly petiolate; petiole to 3 cm, base broadly sheathed; sheath cymbiform, to 11 cm, ca. 5 cm wide; leaf blade reniform, to 21 cm wide. Distalmost stem leaves smaller, sessile. Corymbs compound, spreading; branches to 10 cm, shortly yellow pilose. Capitula numerous; leaflike and supplementary bracts smaller, subulate; peduncles 3-10 mm, shortly yellow pilose. Involucre narrowly campanulate, 9-10 × 4-6 mm, outside glabrous; phyllaries 7-10, oblong, 2-2.5 mm wide, brown ciliate, apex acute; inner phyllaries broadly membranous at margin. Ray florets 3-5, yellow; lamina 3-5-divided, segments filiform or linear, to 1.5 cm; tube ca. 6 mm. Tubular florets more numerous, to 10, yellowish brown, ca. 1 cm; tube as long as limb. Achenes brown, cylindric, 5-6 mm. Pappus reddish brown, slightly shorter than tubular corolla. Fl. and fr. Sep-Nov.
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