Arrange the components of dicot stem with secondary growth from interior to exterior.

I. Phellogen                                                        II. Secondary Phloem                                    

III. Phellem                                                         IV. Phelloderm

Secondary phloem is innermost part of bark. Cork is outermost region of periderm. Phelloderm is innermost part of periderm. In between phellem and phelloderm there is phellogen or cork cambium. The distribution of tissues from inside to outside are secondary phloem, phelloderm, phellogen and phellem.