[Yarrow: The Genus Achillea in Mt. Adams Country]

Yarrow

Achillea millefolium var. occidentalis

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

Inflorescence of Milfoil, Yarrow: Achillea millifolium (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)

The photo above shows a close-up dorsal-view of the inflorescence of yarrow (variety occidentalis) as seen at about 2700' along road K6000 at the southeastern corner of Mt. Adams.........July 11, 2005. Note the 3-5 ray flowers and several white disk flowers that makes up each tiny flower head.

Milfoil, Yarrow: Achillea millifolium (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) - Milfoil, Yarrow: Achillea millifolium (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)

Yarrow (variety occidentalis) were taken along forest road #23 at the Mt. Adams Viewpoint at about 3800' at the southwestern corner of Mt. Adams.........October 14, 2005.
Paul Slichter