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Petiole winged or not

(Not applicable when petiole absent.)
The petiole is the stalk of the entire leaf, but for the operation of this key this feature is applied also to the leaflet stalk of compound leaves. In the case of a sheathing leaf base or petiole, the term petiole is used to describe the free part of the petiole.

L44 distinctly winged

L45 not winged