Delphinium elatum

from The Collaborative International Dictionary of English v.0.48

Larkspur \Lark"spur\, n. (Bot.)
   A genus of ranunculaceous plants ({Delphinium}), having showy
   flowers, and a spurred calyx. They are natives of the North
   Temperate zone. The commonest larkspur of the gardens is
   {Delphinium Consolida}. The flower of the bee larkspur
   ({Delphinium elatum}) has two petals bearded with yellow
   hairs, and looks not unlike a bee.
   [1913 Webster]