The occurrence of parent cell walls in normal wood of Cedrus deodara and compression wood of Araucaria cookii and Pinus halepensis was studied under the electron microscope. Only part of the parent cell wall traversing the intercellular space was visible in compression wood trachieds of A. cookii and P. halepensis while parent wall can be seen between two splitted radial rows of trachieds in the normal wood of C. deodara
