White wormwood

Artemisia albula Wooton, Contr. U.S. Natl. Herb. 16: 193. 1913, based on A. microcephala Wooton, Bull. Torrey Bot. Club 25: 455. 1898, not Hillebrand 1888

Stems 30–80 cm, widely branched, tomentose or glabrous. Leaves uniformly whitish green; blades lance-linear (and entire), or obovate to elliptic (with antrorse teeth or lobes to ¹/3 blade lengths, usually 1–2 cm, margins revolute), faces ± tomentose. Heads in open, paniculiform arrays (9–)15–40 × (4–)8–30 cm. Involucres 1–2 × 2–3 mm. Florets: pistillate 8–11; bisexual 8–13; corollas 1–1.5 mm.

Flowering early summer–fall. Desert drainages, sandy soils; 1500–2000 m; Ariz., Calif., Colo., Nev., N.Mex., Tex., Utah; Mexico.