Not quite as congested as the sky pilots, this frilly leaved Polemonium pulcherrimum is widespread through the montane elevations of the Northern Rockies. I first collected seed near Dog Gone Lake (I kid you not) in Montana where it grew thickly under the pines and spruce. It thrives in the same sort of conditions that suit Auricula primulas and Heucheras--well drained high shade--and has lasted for years in my rock garden. I think it may be my favorite Polemonium, one well worth seeking out. Particularly this Dog Gone form...which blooms much of the spring and often through much of the summer.
By the way, the Latin name means "extremely beautiful" which I would agree with.