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black cottonwood, swamp cottonwood, downy poplar, swamp poplar, Populus heterophylla | North American poplar with large rounded scalloped leaves and brownish bark and wood ❲Populus heterophylla❳ | |
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black cottonwood, Western balsam poplar, Populus trichocarpa | cottonwood of western North America with dark green leaves shining above and rusty or silvery beneath ❲Populus trichocarpa❳ |