Irregularly-shaped, chlorenchymatous cell, separated by large air spaces. [source: GR:Pankaj_Jaiswal]
Comment
Usually found in the abaxial/lower part of the leaf mesophyll as in a dorsiventral leaf, but between two palisade parenchyma layers in an isobilateral leaf. 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.