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Key F2: Woody angiosperms with alternate, compound 4+-foliolate leaves

Plantae

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(c) Summerbell, Emily - CC-BY
1 Leaves palmately-pedately 5-foliolate (the lateral 2 leaflets on each side borne on a common Y-shaped stalk).
1 Leaves palmately compound (all the leaflets attached at a single point).
    3 Leaves > 6 dm wide
    3 Leaves < 3 dm wide.
      4 Leaflets with entire margins; [non-natives].
        5 Plants deciduous woody climbers (but not twining, or specialized climbing structures); leaflets usually 5 per leaf (occasionally 3 or 7); flowers maroon-colored, lacking petals but with 3 prominent sepals, the inflorescences axillary
        5 Plants evergreen shrubs or trees (occasionally partially epiphytic); leaflets usually 7-9 per leaf (occasionally 5 or 10); flowers yellowish-green or red, petals present, lacking showy prominent sepals, the inflorescences (most often) terminal
      4 Leaflets with serrate margins; [natives and non-natives].
          6 Stems armed with prickles scattered in the internodes
          6 Stems unarmed or with paired nodal spines.
             7 Stems often with paired nodal spines; leaves evergreen, glossy; inflorescence an umbel; fruit a drupe, dark purple to back at maturity
             7 Stems unarmed; leaves deciduous, dull or moderately glossy; Inflorescence a panicle (or if a corymb-like cyme, then the leaflets also deeply lobed, as in Ampelopsis aconitifolia); fruit a berry, variously colored
               8 Inflorescence a corymb-like cyme; styles elongate and cylindric; leaflets deeply lobed; tendrils 2-branched, never with terminal adhesive discs; pith between nodes of older stems becoming chambered; berries sometimes with dark spots
               8 Inflorescence a panicle; styles short, conic-shaped; leaflets not deeply lobed; tendrils 3-12-branched, with adhesive discs (these reduced or lanceolate in shape in P. inserta); pith between nodes of older stems not becoming chambered (continuous); berries never spotted