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cottonwood

Any of several fast-growing North American trees of the genus . Members of the willow family, cottonwoods have heart-shaped, toothed leaves and cottony seeds. The dangling leaves clatter in the wind. The eastern cottonwood () has thick glossy leaves. is a hybrid of and the Eurasian black poplar (). The Alamo, or Fremont, cottonwood (), is the tallest of the group. See also poplar.

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