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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Mahonia

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1 Bud scales deciduous, 3-8 mm long; leaflet blades 1-3-veined from the base.
..2 Leaflet blades smooth and somewhat shiny on the undersurface
..2 Leaflet blades papillose and dull on the undersurface
1 Bud scales evergreen, 11-44 mm long; leaflet blades 4-6-veined from the base.
....3 Leaflet blades with 2-7 teeth per side, each tooth 3-8 mm long; leaflets very thick and stiff
....3 Leaflet blades with 6-13 teeth per side, each tooth 1-2 (-3) mm long; leaflets thickish, but flexible when fresh