Yarrow (Achillea millefolium)
Knob Peak, Bull of the Woods W.A., Oregon, 7/2012.
Also known as Milefoil, this aromatic plant grows nearly everywhere. The Latin name refers to the legendary warrior Achilles, who was said to have treated his wounded soldiers with a tincture of this plant during the battle of Troy. Note the fern-like leaves. Behind the lower flowers is a glimpse of Lake Leonore, whose surrounding woods were severely burned by a recent fire.