Common Yarrow, Yarrow, Milfoil
Achillea millefolium var. alpicola
now Achillea millefolium
Synonyms: Achillea borealis, Achillea lanulosa, Achillea lanulosa var. eradiata, Achillea lanulosa var. lanulosa, Achillea millefolium var. alpicola, Achillea millefolium var. californica, Achillea millefolium var. lanulosa, Achillea millefolium ssp. lanulosa, Achillea millefolium var. litoralis, Achillea millefolium var. millefolium, Achillea millefolium var. occidentalis, Achillea millefolium var. pacifica
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The photo at left shows a close-up dorsal-view
of the inflorescence of alpine form of yarrow as seen along the Highline Trail
at about 6900'........July 23, 2005. Note the 3-5 ray flowers and several
white disk flowers that makes up each tiny flower head. The photo at right shows the alpine form of yarrow blooming at about 7200' in cindery soils at the head of Hellroaring Valley, Bird Creek Meadows, Mount Adams.....August 29, 2022.
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The alpine form of yarrow as seen atop the terminal moraine of the Adams Glacier, Mt. Adams Wilderness.....July 19, 2018.
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The photo above shows a close-up side-view
of the inflorescence of the alpine form of yarrow as seen along the Highline
Trail at about 6900'.........July 23, 2005. Beneath the flower head,
one can note the involucral bracts with dark margins, which helps identify this
variety from variety occidentalis. The photo at right shows several late-blooming yarrows along the Climber's Trail (about 7000') on the south rim of Hellroaring Canyon, Yakama Nation lands at Bird Creek Meadows, Mount Adams......September 14, 2022.
The photo above shows a close-up view of a
basal leaf of the alpine form of yarrow as seen along the Highline Trail at
about 6900'.........July 23, 2005.
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Yarrow as seen below the moraine at the southern base of the Mazama Glacier on Mt. Adams........July 19, 2009.
Yarrow still in bloom along the South Climb Trail #183 about one-half mile above Cold Springs Campground, Mt. Adams Wilderness.........October 12, 2014.
Paul Slichter