. The anatomy of woody plants. Botany -- Anatomy. THE ROOT 149. resin canals are found exclusively facing the clusters of protoxylem and are never present in an axial position. In Fig. 105 an older stage of the root of Abies is presented. Here the development of the primary wood is completed, and as a con- sequence the axial resin canal stands out more distinctly. The second- ary activity has pro- ceeded so far that there is now a considerable zone of radially seriate xylem and phloem. The FIG. 104.—Young root of Abies balsamea primary phloem has col- lapsed. The ap- pearance of a layer of cor
. The anatomy of woody plants. Botany -- Anatomy. THE ROOT 149. resin canals are found exclusively facing the clusters of protoxylem and are never present in an axial position. In Fig. 105 an older stage of the root of Abies is presented. Here the development of the primary wood is completed, and as a con- sequence the axial resin canal stands out more distinctly. The second- ary activity has pro- ceeded so far that there is now a considerable zone of radially seriate xylem and phloem. The FIG. 104.—Young root of Abies balsamea primary phloem has col- lapsed. The ap- pearance of a layer of cork or periderm with radially dis- posed elements is obvious in the re- gion of the endo- dermis, and the activity in this tis- sue is the cause of the death and the ultimate shedding of the external or cortical region of the root. It is quite clear, as has, indeed, been pointed out above, that the radial parenchyma of the root of the conifers can in no wise be appropriately designated medullary rays, since the structures. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Jeffrey, Edward C. (Edward Charles), b. 1866. Chicago, Ill. , The University of Chicago Press
Size: 1664px × 1501px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookpublisherchicagoilltheuniversityo, booksubjectbotanyanatomy
