Noun has 2 senses

• black cottonwood(n = noun.plant) downy poplar, populus heterophylla, swamp cottonwood, swamp poplar - North American poplar with large rounded scalloped leaves and brownish bark and wood;


• black cottonwood(n = noun.plant) populus trichocarpa, western balsam poplar - cottonwood of western North America with dark green leaves shining above and rusty or silvery beneath;