. Essentials of botany. Botany; Botany. 36 ESSENTIALS OF BOTANY former serving as channels for air and water, the latter (and w also) giving toughness to the root. Roots of shrubs and trees more than a year old will be n ^ found to have in- , ^J'' r"^^rr~Z7T^ . , ^ ., creased in thickness by the process described in Sect. 88, and a section may look quite un- like the young root- section shown in Fig. 19. 46. Examination of the Root of a Shrub or Tree. — Cut thin trans- verse sections of large and small roots of any hardwood tree' and examine them first with a low power of the microscope,
. Essentials of botany. Botany; Botany. 36 ESSENTIALS OF BOTANY former serving as channels for air and water, the latter (and w also) giving toughness to the root. Roots of shrubs and trees more than a year old will be n ^ found to have in- , ^J'' r"^^rr~Z7T^ . , ^ ., creased in thickness by the process described in Sect. 88, and a section may look quite un- like the young root- section shown in Fig. 19. 46. Examination of the Root of a Shrub or Tree. — Cut thin trans- verse sections of large and small roots of any hardwood tree' and examine them first with a low power of the microscope, as a two- inch objective, to get Fig. 18. Lengthwise Section (somewhat dia- ^^^ general disposition grammatic) through Koot-Tip of Indian Corn, of the parts, then with X about 130. a higher power, as the w, root-cap; i, younger part of cap; z, dead cells hall-inch or quarter- separating from cap; s, growing point; o, epi- inch, for details. With dermis; jj, intermediate layer between epidermis ^jjg Jq^ power note : and central cylinder; p, central cylinder; d, layer ,. rpj^^ brown layer from which the root-cap originates. r i i of outer bark. (J) The paler layer within this. (c) The woody cylinder which forms the central portion of the 1 YouTis: suckers of cherry, apple, etc., which may be puUed up by the roots, win afford excellent 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1908
