Shrubs, 30–80 cm (widely branched, gray-tomentose), aromatic; root-sprouting. Stems relatively numerous, brown or grayish green. Leaves ± deciduous (by late summer, turning yellow); blades lanceolate, oblanceolate, or cuneate, 2.5–5.5 × 0.8–1.2+ cm, entire or irregularly 3–6-lobed (lobes to 1/3 blade lengths, 1.5+ mm wide, rounded or acute; leaves of flowering stems usually smaller, entire), faces ± sericeous or tomentose. Heads (erect) in (leafy) paniculiform arrays 8–15(–25) × 0.5–3(–4) cm. Involucres ovoid or lanceoloid, (2.5–)4–6(–7) mm. Phyllaries lanceolate, sparsely to densely hairy. Florets 8–18(–27); corollas 2.5–3.5, glabrous. Cypselae 1–1.5 mm, glabrous or resinous. 2. = 18, 36, 54, 72.
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