[Members of the Sunflower Family with Flower Heads Like Daisies Found West of the Cascade Mountains]
Yarrow, Common Yarrow, Milfoil:

Achillea millefolium

Synonyms: Achillea borealis, Achillea lanulosa

Yarrow, Common Yarrow, Milfoil: Achillea millefolium (Synonyms: Achillea borealis, Achillea lanulosa)

A close-up of the inflorescence of yarrow as seen along the Hurricane Hill Trail in Olympic National Park.......................July 25, 2008.

Yarrow, Common Yarrow, Milfoil: Achillea millefolium (Synonyms: Achillea borealis, Achillea lanulosa)

This view shows yarrow as seen along the Hurricane Hill Trail in Olympic National Park.......................July 25, 2008.

Yarrow, Common Yarrow, Milfoil: Achillea millefolium (Synonyms: Achillea borealis, Achillea lanulosa) -- Inflorescence of Yarrow, Common Yarrow, Milfoil: Achillea millefolium (Synonyms: Achillea borealis, Achillea lanulosa)

Two close-up views of the inflorescence of yarrow as seen along the beach at Barview Jetty County Park on the Oregon coast................August 26, 2009.
Paul Slichter