Distribution: Occurring east of the Cascades crest in Washington; introduced from British Columbia to Oregon, east to Idaho; native from east of the Rocky Mountains to eastern North America
Habitat: Riparian zones and marshes
Flowers: April-May
Origin: Introduced central and eastern North America
Conservation Status: Not of concern
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PNW Herbaria: Specimen records of Populus deltoides ssp. monilifera in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Populus deltoides ssp. monilifera checklist entry
OregonFlora: Populus deltoides ssp. monilifera information
E-Flora BC: Populus deltoides ssp. monilifera atlas page
CalPhotos: Populus deltoides ssp. monilifera photos