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1 Leaves bipinnate to tripinnate, with > 11 leaflets; [native and alien species]
..2 Leaves palmately 5-foliolate, the leaflets additionally pinnately lobed
....3 Leaves not lobed (to shallowly 3-lobed); young twigs green, glabrous
....3 Leaves 3-5 lobed; young twigs purplish, sparsely puberulent (sometimes becoming glabrate)