-
Populus alba L.
white poplar
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Populus deltoides Bartram ex Marsh.
eastern cottonwood
-
Populus grandidentata Michaux
bigtooth aspen
-
Populus heterophylla L.
swamp cottonwood
-
Populus nigra L.
Lombardy poplar, black poplar
-
Populus tremuloides Michaux
trembling aspen
-
Populus x jackii Sarg.
= P. balsamifera x deltoides
balm-of-Gilead
-
Salix alba L.
white willow
-
Salix atrocinerea Brotero
= S. cinerea ssp. oleifolia (Smith) Macreight
rusty willow
-
Salix atrocinerea and cinerea
rusty and ash willow with hybrids
-
Salix atrocinerea x humilis ? 
-
Salix babylonica hybrids
= S. x sepulcralis = S. babylonica x alba
-
Salix bebbiana Sarg.
Bebb's willow
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Salix candida Fluegge ex Willd.
hoary willow
-
Salix cinerea L.
ash willow
-
Salix discolor Muhl.
large pussy willow
-
Salix eriocephala Michaux
heartleaf willow
-
Salix euxina Belyaeva
= S. fragilis auct. in part.
-
Salix humilis Marsh.
prairie willow, upland willow
-
Salix nigra Marsh.
black willow
-
Salix pedicellaris Pursh
bog willow
-
Salix petiolaris J. E. Smith
slender willow, meadow willow
-
Salix purpurea L.
basket willow
-
Salix sericea Marsh.
silky willow
-
Salix sp. (hybrid) 
-
Salix tristis Ait.
= S. humilis var. microphylla (Anderss.) Fern.
= S. occidentalis Walter
dwarf upland willow
-
Salix x fragilis
hybrid of brittle and white willow
-
Salix x jesupii Fern.
= S. lucida x alba
-
Salix x meyeriana Rostk.
= S. pentandra x S. euxina, S. pentandra auct. in part
-
Salix x smithiana Willd.
= S. caprea (or cinerea) x viminalis
-
Salix x conifera Wangenh.
= S. discolor x humilis
