Distribution: Chiefly east of the Cascades, British Columbia to Oregon, east to Montana and Colorado.
Habitat: Hillsides and open woods at moderate elevations in the mountains, occasionally on grassy foothills.
Conservation Status: Not of concern
Robust perennial without rhizomes, white-woolly throughout, 2-5 dm. tall.
Basal leaves numerous, white-woolly on both sides, up to 15 cm. long and 2 cm. wide; cauline leaves linear, progressively reduced upward.
Heads many in a broad, compact inflorescence; pistillate involucres 5-8 mm. high; the scarious upper portion of the bracts wholly white, the lower portion densely pubescent, white, commonly with a small dark spot at the base.
The similar A. lanata grows at higher elevations, is a smaller plant, and the scarious portion of the involucre bracts is dark. A. luzuloides has involucre bracts that are scarious to the base, the lower portion pale greenish-brown.