Berberis
barberry, mahonia, Oregon-grape
4 species
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Berberis darwiniidarwin's barberry
Distribution: Occasional near the coast in Oregon and California.
Habitat: Prefers high humidity; rarely escapes cultivation
Origin: Introduced
Berberis julianaewintergreen barberry
Distribution: Occurring in lowlands west of Cascades crest in Washington; also in Mississippi and New York.
Habitat: Disturbed, shrubby areas at low elevations, often where wet or marshy.
Origin: Introduced
Flowers: May-June
Berberis thunbergiiJapanese barberry
Distribution: Sparingly introduced in Washington; escaped throughout central and eastern United States and Canada.
Habitat: Disturbed areas
Origin: Introduced
Flowers: April-May
Berberis vulgariscommon barberry, European barberry
Distribution: Introduced as an ornamental, occasionally escaping.
Habitat: Dry, waste ground.
Origin: Introduced
Flowers: March - May