bluebonnet

noun

1. 1

   A traditional flat Scottish hat made of blue wool; a blue tam-o'-shanter.

2. 2

   Someone who wears such a hat; a Scotsman, especially a Scottish soldier.

3. 3

   Any of several blue flowering plants, especially cornflower, Centaurea cyanus, and plants of the genus Scabiosa.

4. 4

   A blue Australian parrot, especially Northiella haematogaster.

5. 5

   Any of several North American species of Lupinus common in the southwestern US, especially Lupinus texensis and Lupinus subcarnosus.