Source : WordNet®

bluebonnet
     n 1: low-growing annual herb of southwestern United States
          (Texas) having silky foliage and blue flowers; a leading
          cause of livestock poisoning in the southwestern United
          States [syn: {buffalo clover}, {Texas bluebonnet}, {Lupinus
          subcarnosus}]
     2: a brimless dark blue Scottish cap with a flat top and a
        plume on one side [syn: {Balmoral}]