Yarrow (Achillea millefolium) is beginning to bloom here, as this image from yesterday shows:
While some yarrow is native to the United States, most of the plants in this area appear to be colorful cultivated varieties in gardens. Native Americans used Yarrow to stanch bleeding and it eventually achieved the common names of Nosebleed Plant and Woundwort. Several species of birds, including Starlings, use Yarrow to line their nests, where it is thought to inhibit parasites. (Brooklin, Maine)