| Name | Height | Leaf | Fruit | Region |
| Trembling Aspen Populus tremuloides |
40′ – 60′, can be 90′ | nearly circular, abrupt sharp tip, 1.5″ – 2″ | pods, nearly conical, .25″ | throughout Canada |
| Largetooth Aspen Populus grandidentata |
50′ – 60′, can be 100′ | oval to almost circular, 2″ – 4″ | pods, narrowly conical | Deciduous and Great Lakes – St. Lawrence |
| Balsam Poplar Populus balsamifera |
60′ – 80′, can be 100′ | oval, tapering to sharp tip, 3″ – 5″ | pods, oval, .25″ – .5″ | Boreal, Great Lakes – St. Lawrence, and Acadian |
| Eastern Cottonwood Populus deltoides |
75′ – 100′ | like equilateral triangle, short tip, 2″ – 4″ |
pods, oval, .25″ – .33″ | Prairies, Deciduous, and Great Lakes – St. Lawrence |
| Black Cottonwood Populus trichocarpa |
80′ – 125′ | broadly oval, tapering to tip, 3″ – 5″ | pods, nearly circular, .33″ – .5″ | British Columbia and western Alberta |
| Narrowleaf Cottonwood Populus angustifolia |
under 40′ | narrow, 2″ – 3″ by .5″ – .75″ | pods, broadly oval, .25″ | southern Alberta and southwestern Saskatchewan |
| Black Willow Salix nigra |
50′ | narrows to long point, finely toothed, 3″ by .5″ | cone-shaped capsule, on catkin | Ontario to Atlantic Coast |
| Shining Willow Salix lucida |
10′, shrub or small tree | long tip, finely toothed, 4.5″ by 1.25″ | ?? | central Saskatchewan to Newfoundland |
| Peachleaf Willow Salix amygdaloides |
up to 40′, often a shrub | long tip, finely toothed, 4″ by 1″ | ?? | tree in Manitoba and Ontario only |
| Beaked Willow Salix bebbiana |
10′, usually shrub | variable, blunt tipped, 2.5″ | long pointed capsule in clusters, .25″ | across Canada |
| Pussy Willow Salix discolor |
to 20′, shrub or tree | short tip, rounded teeth, 3.5″ by 1.25″ | long beaked capsule, .25″ – 5″ | Alberta to Newfoundland |
| Pacific Willow Salix lasiandra |
30′, can be 60′ | long tip, finely toothed, 4.5″ by 1″ | on catkin | Alberta to Pacific Coast |
| Scouler Willow Salix scouleriana |
up to 30′ | blunt tipped, a few teeth, 3″ | long pointed capsule in cluster, .25″ | Saskatchewan to British Columbia |
| Hooker Willow Salix hookeriana |
30′ | blunt tip, 3″ | dense cottony seeds | Vancouver Island |
