When were bluebonnets named the state flower of Texas?
Bluebonnet (plant)
March 7, 1901
On March 7, 1901, Lupinus subcarnosus became the only species of bluebonnet recognized as the state flower of Texas;[2] however, Lupinus texensis emerged as the favorite of most Texans. So, in 1971, the Texas Legislature made any similar species of Lupinus that could be found in Texas the state flower.[3][4]