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Leaf base

The term leaf base refers to the lower portion of a leaf blade, where the leaf blade attaches to its stalk (petiole) or to a stem or branch.
 

    Figure A.  Illustration of leaf components, with stalk (petiole).
                       (Populus deltoides)

 

         Figure B.  Illustration of leaf components, without stalk.
                            (Erigeron annuus)

 

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