CELL TYPE CYTOPLASMIC FEATURES CELL WALL FEATURES 3-D GEOMETRY
Cork Cell
Phellem		 No cytoplasm at maturity

May contain Tannins and/or Resins

 Uniformly thick suberized secondary cell wall which may also be lignified
Transverse Rectangular with longest axis in tangential direction
Radial  Isodiametric
Tangential  Rectangular with longest axis in tangential direction