37c. Artemisia ludoviciana Nuttall subsp. candicans (Rydberg) D. D. Keck, Proc. Calif. Acad. Sci., ser. 4. 25: 447. 1946.
Artemisia candicans Rydberg, Bull. Torrey Bot. Club 24: 296. 1897; A. gracilenta A. Nelson; A. latiloba (Nuttall) Rydberg; A. ludoviciana var. candicans (Rydberg) H. St. John; A. ludoviciana var. latiloba Nuttall; A. vulgaris Linnaeus subsp. candicans (Rydberg) H. M. Hall & Clements; A. vulgaris var. candicans (Rydberg) M. Peck
Stems 30–50(–80) cm, mostly simple, sparsely tomentose. Leaves ± white; blades broadly obovate to oblong, 4–10 × 1.5–4 cm, relatively deeply lobed (lobes, lanceolate, 1/3+ blade lengths, acute), faces tomentose (usually less densely adaxially). Heads in racemiform arrays 4–7 × 2–4 cm. Involucres (broadly campanulate), 4–5 × 4–8 mm. Florets: pistillate 8–10; bisexual 20–30; corollas 1.5–2 mm.
Flowering mid–late summer. Mountains, usually in loamy soils; 1800–3000 m; Alta., B.C.; Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.
Subspecies candicans is broadly circumscribed in this treatment. Variants within the complex, especially var. latiloba, may merit segregation.
