Perennials, 50–150 cm (caudices slender). Stems branched, pubescent. Leaves opposite; petioles 10–40 mm; blades 3-nerved from bases, deltate-ovate to lance-ovate, 30–150 × 20–100 mm, bases sub-truncate to cordate, margins coarsely to finely serrate, apices acuminate, abaxial faces minutely pubescent and gland-dotted, adaxial faces sparsely puberulent. Heads (erect in flower and fruit) in corymbiform or paniculiform arrays. Peduncles 10–25 mm, glandular-pubescent. Involucres broadly campanulate, 10–12 mm. Phyllaries 28–35 in 4–5 series, greenish, often purple-tinged, 4–7-striate, unequal to subequal, margins scarious (ciliate); outer narrowly lanceolate to lance-ovate (glandular-pubescent, apices long-acuminate), mid lanceolate (apices acute to acuminate), inner narrowly lanceolate (apices acute to obtuse, recurved, pubescent, often gland-dotted). Florets 35–45; corollas pale yellow-green, often purple-tinged, 6–7.2 mm. Cypselae 4.5–5.5 mm, hispidulous to glabrate; pappi of 38–46 purple-tinged, barbellate bristles.
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