What Penstemon is this?

[David Cammack]

I think there must be a simple anwer to what Penstemon this is.  I'm just having no luck in idenifying it.  I found it in western Colorado, growing at just over 7,000 ft.  It grows along back country roads in small groupings.

Thanks for any help.

[Lori S.]

I'd guess P. humilis or P. virens, maybe more likely the latter?

[Todd Boland]

Virens has green leaves, not blue (according to Robert Nold)...meanwhile I have a supposed humilis and it does not have blue foliage either, so I'm afriad I'm not much help.