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Aquilegia caerulea
http://plants.usda.gov/cgi_bin/plant_profile.cgi?symbol=AQCA2
Colorado Blue Columbine.
Aquilegia caerulea
http://www.rmrp.com/Photo%20Pages/A/Aquilegia%20caerulaea%20100DPI.htm
Image.
Aquilegia canadensis
http://www.ibiblio.org/unc-biology/herbarium/gallery/aquilegia.html
Flower image and description.
Aquilegia canadensis
http://plants.usda.gov/cgi_bin/plant_profile.cgi?symbol=AQCA
Red Columbine.