Distribution: Occurring in the Olympic and Cascade Mountains of Washington; Alaska to Oregon, east to Montana, and east across Canada to Quebec.
Habitat: Open rocky or gravelly, wet or dry sites, from middle elevations to the alpine, descending to sea level northward.
Flowers: July-September
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Wind
Herbaceous, rhizomatous perennial, the stems 3-15 dm. tall.
Leaves highly variable, chiefly cauline, from entire to deeply lobed, the lobes pointing forward, the lobes again cut; leaves tomentose beneath and green and shining above.
Inflorescence a narrow panicle; heads relatively large and broad, the involucre 3-5 mm. high and 4-8 mm. wide, the bracts sometimes with dark margins; corollas all tubular, the outer 8-15 pistillate; disk flowers 20-40; pappus none; receptacle without hairs.
Achene
PNW Herbaria: Specimen records of Artemisia tilesii in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Artemisia tilesii checklist entry
OregonFlora: Artemisia tilesii information
E-Flora BC: Artemisia tilesii atlas page
CalPhotos: Artemisia tilesii photos