See quotation, 1817.
1817. I walked along the river, and was much struck with the vast size to which the cotton wood tree grows. (Note.) Populus angulosa of Michaux, called by the French Liard.John Bradbury, Travels, p. 15.
1823. N.E.D.
1830. Three beavers were seen cutting down a large cottonwood tree.Mass. Spy, Aug. 4.
1847. Cotton-wood trees are planted on either side of the way; and seats are placed at convenient distances, as in the public squares of Philadelphia.Life of Benjamin Lundy, p. 71 (Phila.).