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Key to Jatropha

Euphorbiaceae

Jatropha

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1 Leaves cordate to ovate, palmately lobed (J. integerrima often with a mix of unlobed and 3-lobed leaves, but these never linear).
  2 Plants with a prominent, round woody, shallow subterranean caudex to 13.5 cm in diameter
  2 Plants without a prominent rounded woody caudex.
    3 Leaves 3-5 lobed (sometimes with a few unlobed leaves or the lobes shallow).
      4 Flowers green to yellowish-white; capsules drupe-like
      4 Flowers pink to maroon colored; capsules explosively dehiscent.