Coolwort, Trefoil Foamflower, Trefoil False Mitrewort
Tiarella trifoliata var. trifoliata
-
- 
Trefoil foamflower as seen in bloom along the Toutle Trail between Blue Lake and Sheep Canyon, Mt. St. Helens National Volcanic Monument.........August 20, 2017.

This photo shows a trifoliate stem leaf of trefoil foamflower as seen along the Wolf Creek Trail in the Umpqua National Forest.........June 26, 2005.
Paul Slichter