Populus
aspen, cottonwood, poplar
7 species
1 subspecies and varieties
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Populus albawhite poplar
Distribution: Distributed on both sides of the Cascades in Washington; widely distributed throughout North America.
Habitat: Disturbed areas often associated with urban and suburban areas, riparian zones.
Origin: Introduced from Europe
Flowers: March-May
Populus angustifolianarrow-leaved cottonwood
Origin: Native
Populus ×canescensgray poplar
Origin: Introduced from Europe
Populus deltoideseastern cottonwood
Origin: Introduced
Populus nigrablack cottonwood, lombardy poplar
Origin: Introduced
Populus tremuloidesquaking aspen
Distribution: Broadly distributed in Washington, but chiefly east of the Cascades in Washington; Alaska to California, east to Labrador and New Jersey.
Habitat: Moist areas, low to fairly high elevations in the mountains
Origin: Native
Flowers: April-June
Populus trichocarpablack cottonwood
Distribution: Occurring throughout Washington; Alaska to California, east to Alberta and Wyoming.
Habitat: Streambanks and moist woods, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-June