Artemisia campestris subsp. canadensis (Michx.) Scoggan

Artemisia canadensis Michx. Fl. Bor. Am. 2: 128. 1803
Artemisia pettcedanifolia Juss.; Besser, Bull. Soc. Nat. Mosc. 8: 91. 1835.
A perennial, with a cespitose rootstock ; stem ascending or decumbent at the base, 1-3 dm. high, sparingly long-hairy or glabrate, striate; basal leaves clustered, 5-10 cm. long, petioled, appressed-sUky, twice pinnatifid into narrowly linear to oblanceolate divisions rarely more than 1 mm. wide; stem-leaves smaller, rather few, pinnately divided into linear divisions or the upper temate or simple ; heads rather few in a narrow panicle, subsessile or short-peduncled, nodding; peduncles 2 mm. long or less; involucre hemispheric, 2.5-3 mm. high, 4—6 mm. broad; bracts 10-12, in about 3 series, glabrous, broadly scarious-margined, all broadly oval and acutish, the outer scarcely shorter; ray-flowers 10-15; corollas nearly 2 mm. long, glabrous; disk-flowers 20-25; coroUas cylindro-campanulate, 5-toothed, glabrous, 2.5 mm. long; style 2 mm. long.
Type iocality: Hudson Bay.
Distribution: Newfoundland to Vermont, Michigan, and Western Ontario; Yukon (?).