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Key to Sapindaceae

Sapindaceae

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1 Leaves opposite; leaves either palmately compound, or simple (and then palmately lobed and/or toothed), or pinnately compound.
  2 Leaves either simple (and palmately lobed and/or toothed) or pinnately compound; flowers radially symmetrical; fruit a schizocarp of 2 samaroid mericarps; [family Aceraceae; or subfamily Hippocastanoideae, tribe Acereae]
  2 Leaves palmately compound; flowers bilaterally symmetrical; fruit a capsule, usually with single large “nut-like” seed; [family Hippocastanaceae; or subfamily Hippocastaoideae, tribe Hippocastaneae]
1 Leaves alternate; leaves compound (if unifoliolate and thus appearing simple [Dodonaea], then unlobed and with entire margins).
    3 Leaves unifoliolate, appearing simple; [subfamily Dodonaeoideae, tribe Dodonaeae]
    3 Leaves compound.
      4 Herbaceous vines or lianas; leaves 3-foliolate or otherwise compound (biternately or pinnately compound); [subfamily Sapindoideae, tribe Paullinieae]
        5 Leaves 3-foliolate
        5 Leaves pinnately to biternately compound.
          6 Fruit a schizocarp with 3 winged mericarps; seeds lacking a pseudohilum
          6 Fruit an inflated, papery capsule; seeds with a white or pale tan heart-shaped or kidney-shaped mark (pseudohilum)
      4 Tree or shrub; leaves 3-foliolate or pinnately or bipinnately compound.
             7 Leaves 3-foliolate; [subfamily Dodonaeoideae, tribe Doratoxyleae]
             7 Leaves pinnately or bipinnately compound.
               8 Fruits dehiscent, a capsule with papery, membranaceous, coriaceous, or woody valves.
                 9 Leaves mostly even-pinnate.
                   10 Leaflet margins serrate; [subfamily Sapindoideae, tribe Cupanieae]
                     11 xxx; [subfamily Sapindoideae, tribe Cupanieae]
                     11 yyy; [subfamily Dodonaeoideae, tribe Dodonaeae]
                 9 Leaves mostly odd-pinnate (with a definite terminal leaflet); [subfamily Sapindoideae, tribe Koelreuterieae]
               8 Fruits indehiscent, with a leathery exterior.