. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. GROWiXG POINTS I9 cells arc arranged in several layers (Fig. S) which can be traced back into the chfferent regions of the mature plant. As the cells of the growing point multiplj', those that remain near the apex retain their power of division, whilst those that come to lie further back gradually pass over into permanent tissue. In the stem the outermost layer of the meristem usually divides only by walls at right angles to the surface to produce a single layer of cells which in the more mature can b
. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. GROWiXG POINTS I9 cells arc arranged in several layers (Fig. S) which can be traced back into the chfferent regions of the mature plant. As the cells of the growing point multiplj', those that remain near the apex retain their power of division, whilst those that come to lie further back gradually pass over into permanent tissue. In the stem the outermost layer of the meristem usually divides only by walls at right angles to the surface to produce a single layer of cells which in the more mature can be recognised as the epidermis (Fig. 8, cp). The innermost cells. Fig. 8.—Growing point of the stem of the Glare's Tail (Hippuris) in longitudinal section, showing the regions of vascular cylinder (T'.C), cortex (C), and epidermis (ep.), and the single meristcmatic cell (i.) from which the central cjdinder arises. derived from the gro\\ing point divide in all directions, and can be traced back into the central region of the stem, which latter consists of the vascular strands and pith (Fig. 8, ). The middle laj-ers of the meristem also segment in like manner, and develop into the tissue situated between the epidermis and the vascular strands, a part of the mature stem known as the cortex (Fig. 8, C). There are thus, at the growing point of the stem, three meristematic regions, known as the dermatogcn, perihlem, and plerome, which respectively give rise to the epidermis, cortex, and vascular cylinder of the 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 Fritsch, Felix Eugene, 1879-; Salisbury, E. J. (Edward James), Sir, b. 1886. London, G. Bell and sons ltd.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpl, booksubjectplants
