. Botany for high schools and colleges. Botany. THE BOOTS OF PLANTS. 163 â¢of the root-cap originate by the successive divisions of the â dermatogen cells by partitions parallel to the curved surface of the root-tip. As the dermatogen is continuous with the -epidermis, we may regard the root-cap as morphologically ^ greatly thickened and somewhat modified Fig. 139.âMode of formation of the lateral roots in a mother-root of Trapa natans. ^, a portionof the pericamblum tt, bounded exrernaily by the innermost layer of cor- tical ceUa, r; d, dermatogen ; n, the inner layer of the peric
. Botany for high schools and colleges. Botany. THE BOOTS OF PLANTS. 163 â¢of the root-cap originate by the successive divisions of the â dermatogen cells by partitions parallel to the curved surface of the root-tip. As the dermatogen is continuous with the -epidermis, we may regard the root-cap as morphologically ^ greatly thickened and somewhat modified Fig. 139.âMode of formation of the lateral roots in a mother-root of Trapa natans. ^, a portionof the pericamblum tt, bounded exrernaily by the innermost layer of cor- tical ceUa, r; d, dermatogen ; n, the inner layer of the pericamhium after splitting ; JS, the same advanced somewhat, the inner layer ia beginning to divide; C, young root enclosed in the tissue of the mother-root; R, r, cortex of mother-root; tt, pen- cambium of mother-root, from which the new root has been formed ; h, first layer of the root-cap of the new root, formed by the splitting of its dermatogen h ; i, w, mass of cell!^ resulting from the division of the layer n\nA; D, new root further devel- oped (the thick cortical tissues of the mother-root are not shown ; r, inner layer of conical tissue of mother-root); p, p, periblem of new root; m, m, the tissue which connects the new root with the tissues of the mother-ioot. Magnified.âAfter Beinke. The plerome column is a mass of nascent fibro-vascular â¢elements, and in it, somewhat further back from the root-tip, a differentiation into the bundle takes 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 Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1888
