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Key to Cardiospermum

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1 Capsule not inflated, 0.8-1.7 cm long; seeds 3-4.5 mm in diameter; leaflets 2.8-4.4 cm long; [FL peninsula southwards]
1 Capsule inflated, 2-4.5 cm long; seeds 3-6 mm in diameter; leaflets 1.7-8 cm long; [collectively widespread in our area, including FL peninsula]
  2 Seed hilum ca. 1/2 as wide as the seed; hilum semicircular to slightly notched on one side; [widespread in our area]
  2 Seed hilum ca. 3/4 as wide as the seed; hilum cordate, heart-shaped because of a deep notch on one side; [s. FL only in our area]
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