Answer to the May's Horticulture Challenge

This is the Red Columbine or the Western columbine (Aquilegia formosa), also known as crimson columbine. It has red sepals and spurs with yellow petal blades, a conspicuous color combination. It is a member of the buttercup family, Ranunculaceae. It is found in Washington, Oregon, Idaho, Montana, California, Nevada and Wyoming. Flowers, are seen from April to August.

Source : Washington State Department of Natural Resources and U.S. Forest Service