Michaux's Wormwood

Artemisia michauxiana Besser; Hook. Fl. Bor. Am. 1: 324 1833.
/lr/<mij>a rfijcofcir A. Gray, Syn. Fl. N. Am. 1': 373, mainly. 1884. Not /I. dt'scotojDougl. 1837.
A perennial, more or less sulTruticose at the base, with a much branched caudcx; stems
2-4 dm. high, floccose when young, glabrate in age, mostly simple; leaves 3-6 cm. long, subsessile, pinnately or bipinnately divided or cleft into linear or lanceolate or rarely broader often toothed divisions, sparingly floccose above when young, glabrate in age, white-tomentose beneath; heads usually in a simple spikeor raceme-like inflorescence, at first nodding; involucre hemispheric, 3-4 mm. high, 5-7 mm. broad; bracts 10-12, in 3 series, the outer linear-lanceolate, acute, shorter than the innermost; inner bracts oval, obtuse; ray-flowers 10-12; corollas 1.5 mm. long; disk-flowers 15-30; corollas about 2 mm. long.
Type locality: Rocky Mountains [Canadian].
Distribution: Saskatchewan to British Columbia, Washington, Utah, and Colorado.