On March 7, 1901, the legislature signed a bill approving Lupinus subcarnosus, a species of bluebonnet, as the state flower. However, there are several species of bluebonnets in Texas and some groups thought that the showier Lupinis texensis should be the state flower. Over the next 70 years, off and on, various groups campaigned for the change.
Finally, in 1971, the Legislature amended the 1901 statute to include Lupinus texensis, the Texas bluebonnet, and any other variety of bluebonnet not yet recorded. Therefore, all species of bluebonnets found in Texas, and any new species discovered, are now considered the official flower of the state. And that’s why Texas has six-ish state flowers.