Penstemon flowers, Mount St. Helens, Mount St. Helens National Volcanic Monument, Washington state, United States of America, North America

One sided penstemon (sidebells penstemon) (Penstemon secundiflorus), San Juan National Forest, Colorado, United States of America, North America

Penstemon flowers, Mount St. Helens, Mount St. Helens National Volcanic Monument, Washington state, United States of America, North America

Whipple's penstemon (Penstemon whippleanus), Gunnison National Forest, Colorado, United States of America, North America

Blue Penstemon (Penstemon cyaneus), Shoshone National Forest, Wyoming, United States of America, North America

One sided penstemon (sidebells penstemon) (Penstemon secundiflorus), Gunnison National Forest, Colorado, United States of America, North America

Broad-tailed Hummingbird (Selasphorus platycercus), male in flight feeding on Rocky Mountain Penstemon (Penstemon strictus), Rocky Mountain National Park, Colorado, USA

Broad-tailed Hummingbird (Selasphorus platycercus), male in flight feeding on Rocky Mountain Penstemon (Penstemon strictus), Rocky Mountain National Park, Colorado, USA

Broad-tailed Hummingbird (Selasphorus platycercus), male in flight feeding on Rocky Mountain Penstemon (Penstemon strictus), Rocky Mountain National Park, Colorado, USA

Broad-tailed Hummingbird (Selasphorus platycercus), male in flight feeding on Penstemon flower (Penstemon sp.), Rocky Mountain National Park, Colorado, USA