Artemisia campestris subsp. pacifica (Nutt.) H. M. Hall & Clem.

Artemisia pacifica Nutt. Trans. Am. Phil. vSoc. II. 7: 401 1841.
Arlemisia desertorum Scouleriana Besser; Hook. Fl. Bor. Am. 1: 325. 1833. Artemisia Scouleriana Rydb. Bull. Torrey Club 33: 157. 1906.
A strict perennial; stem 4-10 dm. high, glabrate or sparingly pubescent when young,
often purplish; basal leaves clustered, petioled, 1-2 cm. long, twice pinnatifid, with narrowly
linear divisions, more or less silky-pubescent; stem-leaves numerous, mostly sessile, often
fascicled, pinnatifid, with narrowly linear or filiform divisions; heads very numerous in a leafy
panicle, at first nodding, soon erect; pedicels 1-3 mm. long; involucre subglobose, about 2.5
mm. high, 2.5-3 ram. broad; bracts 10-12, in 3-4 series, glabrous or sparingly short-hairy,
scaribus-margined ; outermost bracts ovate, acute, about half as long as the inner ones; inner
bracts oval, acutish; ray-flowers 8-12; corollas 1.5 mm. long, glabrous; disk-flowers 8-12;
corollas cylindro-campanulate, 2 mm. long, glabrous; style 1.5 mm. long.
Type locality: Shores of the Pacific at the outlet of the Oregon [Columbia River]. Distribution: Alberta and British Columbia to Oregon and Colorado (?) and New Mexico (?).

Artemisia camporum Rydberg, sp. nov
^ Artemisia campestris Tursh. F. Am. Sept. S21. 1814. Not A. campestris h. 1753. Artemisia canadensis Nutt. Gen. 2: 144. 1818. Not A. canadensis Michx. 1803. Artemisia desertorum Douglasiana Besser; Hook. Fl. Bor. Am. 1; 325. 1833. Artemisia commjitata Dousjasiana Besser, Bull. Soc. Nat. Mosc. 8: 70. 1835. Artemisia Forwoodii'SLydh.F.Coo.i&5. 1906. Not A. Forwoodii S. Wats. 1890.
A perennial, with thick root and short caudex; stem 3-5 dm. high, striate, often purplish; basal leaves clustered, 4-10 cm. long, petioled, twice or thrice pinnatifid into linear or oblong divisions, more or less silky-canescent; stem-leaves scattered, the lower similar to the basal ones but smaller; upper stem-leaves sessile, pinnatifid with narrowly linear divisions, in age sometimes glabrate; heads numerous in a narrow leafy panicle, nodding, heterogamous; peduncles 1-3 mm. long; involucre hemispheric, 2.5-3 mm. high and fully as broad; bracts about 15, in 3-4 series, scarious-margined, the outermost ovate, obtuse, a little more than half as long as the innermost ones, the latter oval with rounded apex; ray-flowers 15-20; corollas 1.5 mm. long; achenes 0.7 mm. long; disk-flowers about 10; corollas cylindro-campanulate, 2 mm. long, glabrous; style 1.5 mm. long.
Type locality: (of A. desertorum Douglasiana) Saskatchewan. Distribution: Ontario to Saskatchewan, Yukon, Arizona, and Nebraska.