Cryptantha and Oreocarya
I don't see many of the Boraginaceae mentioned on the site so I thought I'd start the ball rolling.
The genuses Cryptantha and Oreocarya have several showy perennial species that are garden worthy.
http://www.swcoloradowildflowers.com/White%20Enlarged%20Photo%20Pages/cr...
http://plants.usda.gov/java/profile?symbol=CRYPT