Distribution: Occurring on both sides of the Cascades crest in Washington; Washington to Oregon, east to Idaho; native to central and eastern North America.
Habitat: Disturbed areas and riparian zones, typically in the vicinity of urbanized areas where escaped from cultivation.
Flowers: April-May
Origin: Introduced from central and eastern North America
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Wind
[none provided]
PNW Herbaria: Specimen records of Juglans nigra in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Juglans nigra checklist entry
OregonFlora: Juglans nigra information
E-Flora BC: Juglans nigra atlas page
CalPhotos: Juglans nigra photos