Aquilegia vulgaris (European columbine, Common columbine, Granny's nightcap, Granny's bonnet) is a species of columbine native to Europe. It is a flowering herbaceous perennial plant growing to 1.2 m tall, with branched, thinly hairy stems. The leaves are biternate; each leaf has three groups of three leaflets. The flowers, in various shades of purple, blue, pink and white, are pendent or horizontal with hooked spurs, and appear in early summer. (Wikipedia)

Aquilegia atrata, the dark columbine, is a currently accepted species in the Aquilegia vulgaris complex. It is not genetically distinguishable from the other members of the complex. As the common name suggests it typically, but not always, has dark flowers, either brown, purple or wine-colored. (Wikipedia)