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Key to Serjania

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1 Ultimate leaf segments 1-3 mm wide
1 Ultimate leaf segments 8-20 mm wide.
  2 Fruits ca. 10 mm long, broadest below the middle, the wings lenticular; petals oblanceolate to spatulate, 2-2.5 mm long
  2 Fruits to 35 mm long, broadest above the middle, the wings inflated; petals obovate, ca. 4 mm long