. The anatomy of woody plants. Botany -- Anatomy. 206 THE ANATOMY OF WOODY PLANTS parenchymatous elements containing protoplasmic structures and short empty cells with bordered pits. These are the transfusion elements, and it is easy to observe that they are most abundant on the flanks of the xylem and, in fact, take their origin from this general region. As in the case of the Cordaitales, the cells of the transfusion tissue surround the phloem as well as the xylem. An important difference, however, is the absence of intermingled. FIG. 153.—Transverse section of leaf of Finns Slrobus parenchym
. The anatomy of woody plants. Botany -- Anatomy. 206 THE ANATOMY OF WOODY PLANTS parenchymatous elements containing protoplasmic structures and short empty cells with bordered pits. These are the transfusion elements, and it is easy to observe that they are most abundant on the flanks of the xylem and, in fact, take their origin from this general region. As in the case of the Cordaitales, the cells of the transfusion tissue surround the phloem as well as the xylem. An important difference, however, is the absence of intermingled. FIG. 153.—Transverse section of leaf of Finns Slrobus parenchymatous elements in the girdle of transfusion tissue of the older group. Transfusion tissue is better developed in the leaf of the pine than in any other of the subtribes of conifers. In most of the other subgroups of the Coniferales the transfusion tissue is mainly confined to the flanks of the fibrovascular bundle, and the conducting strand as a whole is not sharply separated from the remaining tissues of the leaf on account of the absence of an endo- 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
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