Shrubs, 5–15 or 20–150(–200) cm, aromatic; root-sprouting (caudices with adventitious buds, fibrous rooted). Stems pale gray, glabrous. Leaves deciduous, gray-green; blades broadly cuneate, 1.5–4 × 0.5–2 cm, deeply 3-lobed (lobes 1–1.4 mm wide, acute; cauline leaves smaller, mostly 3-lobed). Heads in paniculiform or spiciform arrays (5–)8–15(–35) × (0.5–)1–5 cm. Involucres globose or turbinate, 2–4 × 1.5–3 mm. Phyllaries broadly lanceolate (margins scarious, obscured by indument), canescent. Florets 3–11; corollas 2–2.5 mm, glandular (style branches included). Cypselae (columnar, unequally ribbed) 1.8–2.3 mm, glabrous or resinous.
B.C., Idaho, Nev., Oreg., Wash., Wyo.
Subspecies 2 (2 in the flora).