Lupinus havardii is a species of lupine known by the common names Big Bend bluebonnet and Chisos bluebonnet. It is native to Texas and Chihuahua, where it blooms between January and June. Its habitat includes gravelly, fine talus, and the alluvial soils in the desert, valleys, hills, and mountain slopes.
It is an erect annual herb with a slender, branching stem which can reach 4 ft in height. The flower is about half an inch long and purple to blue in color. The spot on its banner is white, turning yellow then red. The palmate leaves are each made up of about seven leaflets.
Bluebonnets in Big Bend National Park
Ajilvsgi, Geyata. (1984). Wildflowers of Texas. Library of Congress: 84-50025
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