Bluebonnet

矢车菊花美丽绽放壁纸

Bluebonnet is a name given to any number of species of the genus Lupinus predominantly found in southwestern United States and is collectively the state flower of Texas. The shape of the petals on the flower resembles the bonnet worn by pioneer women to shield them from the sun. Species often called bluebonnets include :

• Lupinus texensis, Texas bluebonnet or Texas lupine

• Lupinus havardii, Big Bend bluebonnet or Chisos bluebonnet

• Lupinus argenteus, silvery lupine

• Lupinus concinnus, Bajada lupine

• Lupinus plattensis, Nebraska lupine

• Lupinus subcarnosus, sandyland bluebonnet or buffalo clover

On March 7, 1901, Lupinus subcarnosus became the only species of bluebonnet recognized as the state flower of Texas; 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.

As an extension of Lady Bird Johnson's efforts at highway beautification in the United States (see Highway Beautification Act), she encouraged the planting of native plants along Texas highways after she left the White House. Bluebonnet blooms are now a common sight along these highways in the springtime. They serve as a popular backdrop for family photographs, and the Department of Public Safety issues safety recommendations with regard to drivers pulling off highways to take such pictures.

A Bluebonnet flower, sometimes known as a bloom or blossom, is the reproductive structure found in plants that are floral. The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs. Flowers may facilitate outcrossing or allow selfing. Some flower produce diaspores without fertilization (parthenocarpy). Summer Flowers contain sporangia and are the site where gametophytes develop. Many Nature have evolved to be attractive to animals, so as to cause them to be vectors for the transfer of pollen. After fertilization, the ovary of the flower develops into fruit containing seeds.

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