| balsam poplar | (n) poplar of northeastern North America with broad heart-shaped leaves, Syn. Populus balsamifera, hackmatack, tacamahac |
| black cottonwood | (n) cottonwood of western North America with dark green leaves shining above and rusty or silvery beneath, Syn. Populus trichocarpa, Western balsam poplar |
| balsam poplar | (n) poplar of northeastern North America with broad heart-shaped leaves, Syn. Populus balsamifera, hackmatack, tacamahac |
| black cottonwood | (n) cottonwood of western North America with dark green leaves shining above and rusty or silvery beneath, Syn. Populus trichocarpa, Western balsam poplar |