Artemisia campestris subsp. pacifica

(Nuttall) H. M. Hall & Clements
Publ. Carnegie Inst. Wash. 326: 122. 1923.
Common names: Western sagewort
Endemic
Basionym: Artemisia pacifica Nuttall Trans. Amer. Philos. Soc., n. s. 7: 401. 1841
Synonyms: Artemisia campestris var. petiolata S. L. Welsh Artemisia campestris var. scouleriana (Besser) Cronquist Artemisia desertorum var. scouleriana Besser Oligosporus campestris subsp. pacificus (Nuttall) W. A. Weber Oligosporus pacificus
Treatment appears in FNA Volume 19. Treatment on page 508. Mentioned on page 506.

Perennials, 30–100 cm. Stems 2–5. Leaves: basal rosettes persistent (faces green and glabrous or gray-green and sparsely hairy). Heads in arrays 10–22 × 1–3(–7) cm. Involucres turbinate, 2–3 × 2(–3) mm.


Phenology: Flowering mid–late summer.
Habitat: Sandy soils, arid regions
Elevation: 100–2500 m

Distribution

V19-855-distribution-map.gif

Alta., B.C., Man., Sask., Alaska, Ariz., Calif., Colo., Idaho, Mont., Nebr., Nev., N.Mex., Oreg., Tex., Utah, Wash., Wyo.

Discussion

Throughout western North America, members of the Artemisia campestris complex can be assigned to subsp. pacifica. Although morphologically distinct through much of its range, subsp. pacifica may intergrade with subsp. canadensis and A. borealis in areas where their ranges overlap.

Selected References

None.

Lower Taxa

None.

Leila M. Shultz +
(Nuttall) H. M. Hall & Clements +
Artemisia pacifica +
Western sagewort +
Alta. +, B.C. +, Man. +, Sask. +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nebr. +, Nev. +, N.Mex. +, Oreg. +, Tex. +, Utah +, Wash. +  and Wyo. +
100–2500 m +
Sandy soils, arid regions +
Flowering mid–late summer. +
Publ. Carnegie Inst. Wash. +
Artemisia campestris var. petiolata +, Artemisia campestris var. scouleriana +, Artemisia desertorum var. scouleriana +, Oligosporus campestris subsp. pacificus +  and Oligosporus pacificus +
Artemisia campestris subsp. pacifica +
Artemisia campestris +
subspecies +