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

aspen poplar, balsam poplar, black poplar, downy poplar, gray poplar, grey poplar, lombardy poplar, mexican swamp cypress, mountain swamp gum, necklace poplar, okefenokee swamp, poplar, poplar bluff, poplar tree, silver-leaved poplar, swamp, swamp ash, swamp azalea, swamp bay, swamp birch, swamp blackberry, swamp blueberry, swamp buggy, swamp candleberry, swamp candles, swamp chestnut oak, swamp cottonwood, swamp cypress, swamp dewberry, swamp fever, swamp fly honeysuckle, swamp gum, swamp hare, swamp hickory, swamp honeysuckle, swamp horsetail, swamp laurel, swamp lily, swamp locust, swamp mallow, swamp maple, swamp milkweed, swamp oak, swamp pine, swamp plant, swamp rabbit, swamp red oak, swamp rose mallow, swamp sparrow, swamp sunflower, swamp white oak, swamp willow, tulip poplar, western balsam poplar, white poplar, yellow poplar