Canada Columbine, Aquilegia canadensis
Ranunculaceae or Buttercup Family

Small plant with beautiful, intricate flowers, red and yellow, with four long backward spurs and many yellow stamens, nodding at the end of the flowerstalks.  Leaves with three leaflets; each leaflet delicately and intricately lobed. 

Native plant of rocky outcrops.  Occasional along Wildwood Drive. 

Unmistakable.  Garden columbine (Aquilegia vulgaris) has similar flowers, but they are blue, purple or white, and about as wide as long.  It sometimes escapes from cultivation and can turn up in the park.