koshum
white poplar
balsam poplar
plains cottonwood, common cottonwood, eastern cottonwood
bigtooth aspen
quaking aspen
white willow
weeping willow
gray willow, Bebb's willow
sageleaf willow
pussy willow
crack willow
Humboldt's willow
shining willow
black willow
bog willow
tea-leaf willow, diamondleaf willow, plainleaf willow
purple willow, basket willow, purple osier