Dig deeper at SERNEC, a consortium of southeastern herbaria.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Ranunculales
Flora of North America
Cascade Oregon Grape, Cascades Mahonia
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Dave Powell, USDA Forest Service (retired), Bugwood.org bug_1213006
Plants usually low (commonly 0.1-0.3m), but occasional plants may be to 2m, per Flora of North America.
Dave Powell, USDA Forest Service (retired), Bugwood.org bug_1213006b
Leaflet blades with 6-13 teeth per side; fresh leaflets thickish but flexible, per Weakley's Flora.