- swamp cottonwood, black cottonwood, downy poplar, swamp poplar, Populus heterophylla - North American poplar with large rounded scalloped leaves and brownish bark and wood
--1 is a kind of cottonwood
- black cottonwood, Western balsam poplar, Populus trichocarpa - cottonwood of western North America with dark green leaves shining above and rusty or silvery beneath
--2 is a kind of cottonwood