Northeastern United States, Mid-Atlantic United States, Southeastern United States, Central United States, Canada, Mexico
China, Japan, Korea
Plains Cottonwood, Rio Grande cottonwood
jiujiangense, horizontale
bottomlands, Floodplain, Hardwood forests, Riverbanks
Cold Regions
1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21
2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 20, 21