Dave Powell, USDA Forest Service (retired), Bugwood.org
Pike and San Isabel National Forests, south-central Colorado
Dave Powell, USDA Forest Service (retired), Bugwood.org
close-up of flowers
Dave Powell, USDA Forest Service (retired), Bugwood.org
close-up of three flowers in group
Dave Powell, USDA Forest Service (retired), Bugwood.org
side view close-up of single flower cluster
Mary Ellen (Mel) Harte, Bugwood.org
beardlip penstemon (Penstemon barbatus) flower(s)
Mary Ellen (Mel) Harte, Bugwood.org
Crandall's beardtongue (Penstemon crandallii) flower(s)
Mary Ellen (Mel) Harte, Bugwood.org
tiger beardtongue (Penstemon mensarum) flower(s)
Mary Ellen (Mel) Harte, Bugwood.org
Crandall's beardtongue (Penstemon crandallii ssp. procumbens) flower(s)
Mary Ellen (Mel) Harte, Bugwood.org
littleflower penstemon (Penstemon procerus) flower(s)
Karan A. Rawlins, University of Georgia, Bugwood.org
UCDavis gardens
Harlan B. Herbert, Bugwood.org
Taken July 1983
Dorothy Long, 2015 New England Wild Flower Society, Bugwood.org
hairy beardtongue (Penstemon hirsutus) plant(s) on ( )