Walnut Family
1 genera
4 species
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Juglans ailantifoliaJapanese walnut
Origin: Introduced
Juglans hindsiinorthern California walnut
Origin: Introduced
Juglans nigrablack walnut
Distribution: In scattered locations across Washington, mostly east of the Cascades; central U.S. east to the Atlantic Coast.
Habitat: Disturbed areas and riparian zones, typically in the vicinity of urbanized areas where escaped from cultivation.
Origin: Introduced
Flowers: April-May
Juglans regiaEnglish walnut
Origin: Introduced from Europe