. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. I04 TRANSPORT OF WATER AND SOIL SOLUTES system comparable in this respect to the anastomosing veins and arteries of the animal body. It will be seen that if the leaves on one side of a tree are made to transpire faster than those on the other because of greater exposure to the sun or drying wind from that quarter they can draw upon the water in the whole circle of bundles in the trunk; or when one side of a stem is severely injured so as to interrupt the flow of wa
. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. I04 TRANSPORT OF WATER AND SOIL SOLUTES system comparable in this respect to the anastomosing veins and arteries of the animal body. It will be seen that if the leaves on one side of a tree are made to transpire faster than those on the other because of greater exposure to the sun or drying wind from that quarter they can draw upon the water in the whole circle of bundles in the trunk; or when one side of a stem is severely injured so as to interrupt the flow of water on that side, the leaves above the injured part can draw their water from the opposite side, which in turn can reimburse itself from the injured side below the wound. The vascular bundles that descend from a leaf into the stem con- stitute a leaf trace. The number of bun- dles in each leaf trace varies commonly from one to three, but there The rule is that the whole ring of vascular. â Fig. 49.âA, diagram of course of vascular bundles in a palm stem; iw, 2m, 3m, bundles from the median portions of the leaves. B, diagram of vascular bundles in external view and, in cross section of the stem of Cerastium. The leaves are shown cut off at x, â ^,â¢2' and 3. (After Vines.) may be more. bundles in Dicotyledons is composed of leaf traces, but, as was stated above, instances occur where bundles do not extend into the leaves, and these anomalously are in the pith or even in the cortex, and since they do not run out of the stem they are called cauline bundles, while the others that run into the leaves are called common 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 Stevens, William Chase, 1861-. Philadelphia, P. Blakiston's Son
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