The herbaceous perennial plant Gentiana calycosa is a species of gentian known by the common names Rainier pleated gentian and mountain bog gentian. (wikipedia.org)
Explorer's4
From your description I keep coming back to Gentiana calycosa (Rainier pleated gentian) which I know is also called bog gentian (or mountain bog gentian) or explorer's gentian and I think you have ruled that one out. (wildflower.org)
I had found a colony of explorer's gentians ( Gentiana calycosa )! (floralfinds.com)
I stopped the car and was shocked to see the gorgeous, large blue flowers of explorer's gentian ( Gentiana calycosa ). (westerncascades.com)
My most exciting day of last year was finding explorer's (or bog) gentians ( Gentiana calycosa ) at Warner Mountain (see Hidden Bog on Warner Mountain ). (westerncascades.com)
Gentians1
Like other gentians, G. calycosa is an attractive mountain wildflower good for use in alpine gardens, but it may be difficult to grow, preferring rocky soils that are moist. (wikipedia.org)
Gentiana parryi (Parry's gentian) looks similar and another name for it is mountain gentian . (wildflower.org)
Mountain bog gentian1
The herbaceous perennial plant Gentiana calycosa is a species of gentian known by the common names Rainier pleated gentian and mountain bog gentian. (wikipedia.org)
There are not very many species of Gentiana in the Cascades, and they are never terribly common. (westerncascades.com)
Flower1
The flower of Gentiana calycosa is a funnel-shaped cup opening into a five-petaled face 3 to 5 centimeters (1.2 to 2.0 in) wide, in shades of deep blue to purple. (wikipedia.org)