Railroad tracks overgrown with Bluebonnets (Lupinus texensis),Texas, USA, North America - stock photo

The bluebonnet, as a name common to several North American species of Lupinus, is the state flower of Texas. They typically grow about 0.3 m (1 ft) tall. The name may come from the shape of the petals of the flower and their resemblance to the bonnets worn by pioneer women to shield themselves from the sun. It may instead be derived from the Scottish term bluebonnet, for the traditional blue colored version of the tam oshanter hat.