Official State Flowers of the United States

Lupinus texensis - Texas bluebonnet

Lupinus texensis – Texas bluebonnet

Texas State Flower – Texas designated the bluebonnet as the official state flower in 1901. Bluebonnet flowers were named for the blue color and sunbonnet-shaped petals (though not all bluebonnets are blue)

Lupinus texensis, the Texas bluebonnet or Texas lupine is a species of lupine endemic to Texas. With other related species of lupines also called bluebonnets, it is the state flower of Texas.It is an annual which begins its life as a small, gravel-like seed. The seed has a hard seed coat that must be penetrated by wind, rain, and weather over the course of a few months (but sometimes several years). In the fall, the bluebonnets emerge as small seedings with two cotyledons, and later a rosette of leaves that are palmately compound, with five to seven leaflets 3–10 cm long, green with a faint white edge and hair. Growth continues over the mild winter, and then in the spring takes off, rapidly grow larger, before sending up a 20– to 50-cm-tall plume of blue flowers (with bits of white and occasionally a tinge of pinkish-red). The scent of these blossoms has been diversely described; many people say they give off no scent at all, while a few have described the scent as ‘sickly sweet’.Texas recognizes all native lupine species occurring in the state as the official state flower. That fact leads to other species such as L. subcarnosus and L. havardii also being referred to as bluebonnets, but distinctions are seen among the species that differentiate them from L. texensis.