black cottonwood
1. North American poplar with large rounded scalloped leaves and brownish bark and wood • Syn: swamp cottonwood, downy poplar, swamp poplar, Populus heterophylla • Hypernyms: cottonwood 2. cottonwood of western North America with dark green leaves shining above and rusty or silvery beneath • Syn: Western balsam poplar, Populus trichocarpa • Hypernyms: cottonwood
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