|cottonwood (Populus deltoides)||
cottonwood (Populus deltoides; WILLOW FAMILY [Salicaceae]) Tall (75-100'), very fast growing tree with dark, deeply furrowed bark. Leaves are broadly triangular, 3-6" long and almost as wide, with coarsely rounded teeth. Mature bark is dark gray and furrowed. Cottonwoods are phreatophytes, extending their roots right down to the water table. 
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