A papilla cell that is part of a leaf epidermis. [source: POC:curators]
Comment
See leaf papilla (GO:0090396) for the subcellular component leaf papilla. If you are annotating to this term, please add an additional annotation to vascular leaf (PO:0009025) or non-vascular leaf (PO:0025075), depending on the species. All annotations for angiosperms, gymnosperms, and pteridophytes should go to vascular leaf and all annotations for bryophytes should go to non-vascular leaf.