Aquilegia canadensis --- Wild columbine. Long-blooming nectar source for migrating hummingbirds. Likes a poor soil; grows 2-3ft. by 1-1.5 ft. (Look for 'Little Lanterns' which stays under 10".) One of the few flowers that will grow under pines.
Aquilegia caerulea ‘Krystal’, large flowers for a Columbine. Along with A. chrysantha, it’s also the longest blooming – until mid-Summer. Cut back to a few inches tall when it’s done & it very often blooms again in Fall. Healthy, long-lived & fragrant. To 3’ x 2’. Rich soil is best. Zones 3-10