Perennials, 40–120 cm (caudices woody). Stems branched, pubescent, gland-dotted. Leaves mostly opposite, sometimes alternate or subopposite; petioles 0–3 mm; blades 3-nerved from bases, lanceolate to obovate, 20–60 × 12–30 mm, bases ± cuneate, margins crenate to serrate, apices obtuse to acute, abaxial faces tomentose, often densely gland-dotted as well (venation raised, reticulate), adaxial faces pubescent and gland-dotted. Heads in ± dense, racemiform or paniculiform arrays. Peduncles 2–15 mm, densely tomentose, often gland-dotted. Involucres cylindric to campanulate, 8–13 mm. Phyllaries 18–22 in 5–7 series, greenish, often purplish-tinged, 6–8-striate, unequal, margins scarious (apices acute to acuminate); outer ovate (sparsely villous, gland-dotted, lengths no more than 1/2 inner, margins long-ciliate), inner narrowly lanceolate to linear-oblong (glabrous). Florets 10–21; corollas greenish, yellow, or yellow-orange, often purple-tinged, 5–7 mm. Cypselae 3.5–5 mm, sparsely to densely pubescent; pappi of 30–35, white to tawny, barbellate bristles. 2n = 18.
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