Lfy herb up to 1 m. tall; branches ± flexuous, up to 1·5 cm. diam., fistular in upper parts, hairs sparse, spreading. Lower lvs up to ± 20 cm. long including petiole; lamina membr., with sparse glandular hairs, in outline broadly ovate and shallowly cordate to ovate-oblong, ± deeply lobed; lobes broad, distantly dentate, acute; petiole = or > lamina, ± lobately winged in upper part, broadening to auriculate base. Upper lvs smaller and narrower, merging into linear bracts of corymb. Capitula ∞, broadly campanulate, up to 2 cm. diam., in corymbs, on glandular-pubescent slender pedicels bearing filiform bracteoles. Phyll. linear-oblong, acuminate, with thickened midrib and scarious margins, pubescent on back and tip. Ray-florets 15-20, with spreading yellow ligules up to c. 1 cm. long. Achenes narrow-oblong, ± pubescent to glab., c. 1-2 mm. long; pappus-hairs up to 5 mm. long, slender, barbellate.