cot·ton·wood /-ˌwʊd/
白楊的一種
Cot·ton·wood n. Bot. An American tree of the genus Populus or poplar, having the seeds covered with abundant cottonlike hairs; esp., the Populus monilifera and Populus angustifolia of the Western United States.
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cottonwood
n 1: any of several North American trees of the genus Populus
having a tuft of cottony hairs on the seed
2: American basswood of the Allegheny region [syn: white
basswood, Tilia heterophylla]