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1 Leaves simple, but deeply 5-7-lobed (the sinuses not reaching the petiole); corollas either yellow or white with a purplish throat
  2 Leaf lobe margins sinuate-dentate to sublobed; corollas white with a purple center; fruiting calyx ca. 5 cm in diameter
  2 Leaf lobe margins entire; corollas yellow; fruiting calyx ca. 10 cm in diameter
1 Leaves palmately (3-) 5-foliolate (the leaflets not interconnected by blade tissue); corollas white
    3 Stems and leaves with glandular hairs
    3 Stems and leaves glabrous or with non-glandular hairs.
      4 Leaflet margins entire
      4 Leaflet margins serrate