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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 Citrus

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1 Leaves trifoliolate; fruit densely pubescent, 3-6 cm long
1 Leaves unifoliolate; fruit glabrous, 4.5-25 cm long.
..2 Petiole winged, and with an articulation at the juncture with the blade; fruit 4.5-15 cm long
..2 Petiole not winged, and lacking an articulation at the juncture with the blade; fruit 15-25 cm long
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