Blue columbine (Colorado columbine) (Aquilegia coerulea) in an Alpine basin, San Juan National Forest, Colorado, United States of America, North America

Blue columbine (Colorado columbine) (Aquilegia coerulea), San Juan National Forest, Colorado, United States of America, North America

The Common Columbine (Aquilegia vulgaris) in flower on heathland in summer, Little Haldon, near Teignmouth, Devon, England, United Kingdom, Europe

Blue columbine (Aquilegia coerulea) in a meadow, Maroon Bells-Snowmass Wilderness, White River National Forest, Colorado, United States of America, North America

Columbine, Aquilegia vulgaris

Blue columbine (Aquilegia coerulea), Weston Pass, Pike and San Isabel National Forest, Colorado, United States of America, North America

Blue Columbine (Aquilegia coerulea), Maroon Bells-Snomass Wilderness, White River National Forest, Colorado, United States of America, North America

Rocky Mountain red columbine (Aquilegia elegantula), Gunnison National Forest, Colorado, United States of America, North America

Yellow columbine (Aquilegia flavescens), Glacier National Park, Montana, United States of America, North America

Red Columbine (Aquilegia formosa); Grasshopper Meadow Trail, Willamette National Forest, Cascade Mountains, Oregon.

Container Ship Columbine Maersk, Bremerhaven, Bremen, Germany, Europe

Broad-billed Hummingbird (Cynanthus latirostris), male in flight feeding on columbine, Madera Canyon, Tucson, Arizona, USA

Rufous Hummingbird (Selasphorus rufus), immature in flight feeding on columbine, Paradise, Chiricahua Mountains, Arizona, USA

Broad-billed Hummingbird (Cynanthus latirostris), male in flight feeding on longspur columbine (Aquilegia longissima), Madera Canyon, Tucson, Arizona, USA

Cindy Fairchild, of Aurora, Colo., prays below a six-foot cross in honor of Columbine shooter Dylan Klebold at Robert F. Clement Park in Littleton. Fifteen identical crosses were planted on a hill in the park, one for each victim of the shootings at Columbine High, including shooters Eric Harris and Dylan Klebold.

A young girl sitting in a Parry's Primrose meadow at a small tarn near Columbine Lake in the San Juan National Forest, Silverton, Colorado, Silverton, Colorado, usa

Columbine (Aquilegia) blooms in an Oregon garden, Astoria, Oregon, United States of America