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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Melilotus

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1 Corolla yellow.
  2 Corolla 2-3.5 mm long; fruits < 3 mm long
  2 Corolla 5-7 mm long; fruits > 3 mm long
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