Much of the literature on morphology of conifers has been concerned with wood anatomy. There are now available several excellent books on wood structure (6, 1 & 8). Most of the literature on morphology of forest trees presents more or less generalized descriptions (3 & 2) of various tissues for Angiosperms and Gymnosperms. In connection with a pathology problem, a histological study was made of root and stem tissues of shortleaf pine (Pinus echinata Mill.), outside the woody cylinder which are commonly called bark. A description and photomicrographs of root bark were given in a previous paper (5) on food reserves in pine roots. It was found that there is very little difference in the general structure of root and shoot bark. Furthermore, there is a close similarity in the bark morphology of loblolly (P. taeda L.), slash (P. elliottii Engelm.) and longleaf pine (P. palustris Mill.).