Ranunculus alismifolius (Buttercup)
Ranunculaceae (Buttercup Family)

Montane, subalpine. Meadows, wetlands. Spring, summer.

"Alismifolius" means "with Plantain-like leaves".

Because of the shape of Ranunculus flowers, bees do not pollinate them very well, but the bees do try and in the process leave an abundance of pollen on the glossy petals.  Dew and rain slide off the slick, shiny surface carrying the pollen to the stigmas below to fertilize them. Very clever.  

The Ranunculaceae name is ancient and probably is derived from the Latin "rana", meaning "frog" or "tadpole".  Most likely the name was applied because frogs and some Ranunculaceae prefer the same moist habitat -- or the name might refer to some long forgotten perceived relationship in size, shape, smell, etc. Linnaeus named this genus in 1753.