Linum ‘Lewisii’ or common prarie flax is a gorgeous early spring native to much of the US and Canada. With flowers ranging from a gorgeous deep blue as they begin to open, to a lovely violet in its full glory, these are a great bet for a Colorado native garden. This herbaceous plant has small leaves on narrow stems that sway with the wind. Stems grow in a bunch forming an nice wide vase shape.
To grow these is easy, and can be propagated by seed. I started the plant shown from seed in early 2014 indoors. The plant remained small the first year only getting a few stems. This year its at its best. I have also started seedlings from 2014 purchase with a nearly 100% propogatation rate.
For native range see http://plants.usda.gov/core/profile?symbol=LILE3