part_of part of part of periderm peridermis (Spanish, exact) 周皮 (Japanese, exact) After secondary growth, the periderm may replace the epidermis in stems and roots, rarely in other organs. In some cases, the epidermis is retained after periderm development. Periderm is derived from lateral meristem and may contain secondary phloem. plant_anatomy PO:0005046 PO_GIT:110 portion of peridermal tissue (exact) portion of periderm tissue (exact) A peripheral portion of ground tissue (PO:0025059) in a plant axis (PO:0025004) that is composed of cork cambium (phellogen; PO:0005599), phellem (PO:0004003), and phelloderm (PO:0005050). plant axis portion of ground tissue