When were bluebonnets named the state flower of Texas?
Bluebonnet (plant)
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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]