Spiraea genus --- rose subfamily 2    

shiny-leaf spiraea (Spiraea lucida) -- in June -- Glacier National Park, Montana      white & cream  

shiny-leaf spirea (Spiraea lucida) -- in July -- Grand Teton National Park, WY

Douglas' spiraea (Spiraea douglasii) -- in July -- Dunes State Park,  northern California     red & pink     

rose meadowsweet (Spiraea splendens) -- in July -- Yosemite National Park, CA      red & pink