trollius genus --- Buttercup Family

American globeflower (Trollius laxus ssp. albiflorus) -- in June -- Beartooth Highway, Gallatin National Forest, southern Montana        

American globeflower (Trollius laxus ssp. albiflorus) -- in August -- Snowy Range, Medicine Bow National Forest, WY    white & cream  

American globeflower (Trollius laxus ssp. albiflorus) -- in May -- Colorado State Forest State Park, CO   yellow & orange