One of the two types of short cells in the epidermis of grasses and bamboos. It is usually paired with silica cell. [source: TAIR:Katica_Ilic]
Comment
Developmentally different from periderm cork cell (i.e., phellem), produced by cork cambium. If you are annotating to this term, please add an additional annotation to vascular leaf (PO:0009025).