blue·bon·net 
(blbŏn′ĭt)
(blbŏn′ĭt)n.
1. Any of several annual North American lupines having palmately compound leaves and blue flowers, especially Lupinus texensis, chiefly found in Texas.
2.
a. A broad, blue woolen cap worn in Scotland.
b. A person wearing such a cap.
bluebonnetTexas bluebonnet
Lupinus texensis