Mexican wormwood

Artemisia mexicana Willdenow ex Sprengel, Syst. Veg. 3: 490. 1826; A. neomexicana Greene ex Rydberg; A. revoluta Rydberg

Stems 30–80(–100) cm, widely branched, sparsely hairy or glabrous. Leaves strongly bicolor (white and green, or gray-green and green), narrowly lanceolate, 4–10 × 0.5–1 cm, lobed; faces ± tomentose (abaxial) or glabrescent. Heads in paniculiform or racemiform arrays 1–8 × 2–5 cm. Involucres (campanulate) 3–4 × 2–3 mm. Florets: pistillate (5–)8–10; bisexual (6–)10–20; corollas ca. 1.5 mm. 2n = 18, 36.

Flowering late summer–late fall. Mountain slopes, rocky soils; 500–1000 m; Ariz., Colo., Nev., N.Mex., Okla., Tex.; Mexico.