Potentilla biennis   biennial or Greene's cinquefoil
           
  
Rosaceae
native                      herbaceous           
Distribution: Greenbelt, Lucky Peak, Oregon Trail
Bloom: May - Sep

UW Burke Herbarium Link: Potentilla biennis
USDA Plants Link: Potentilla biennis   (POBI7)
Flora of North America Link: Potentilla biennis