Piper’s Anemone, a native species, has been added to the USWildflowers database (06/06/2012.) Scientific name is Anemone piperi.  Photo below was taken in the Ponderosa State Park, Valley County, ID on May 31, 2012. Go to the Piper’s Anemone detail page for more information.

Piper’s Anemone, Windflower – Anemone piperi