Abstract
The presence and structure of the wart layer was investigated in the tracheids of the following juniper species: J. communis L., J. communis var. saxatilis Pall., J. sabina L., J. virginiana L., J. chinensis L. and J. squamata Lamb. The wart layer was found to be present in the tracheids of the stem, roots and branches of spring and summer growths, thus, it is an integral element of their structure. It would seem that this layer is a trait of these juniper species and may be one of the taxonomic features of their wood.
Keywords
Juniperus; wart layer; scanning electron microscopy