. Elements of botany. Botany; Botany. THE PARTS OF THE SEEDLING. 13 ing glass, then as opaque objects in a cell under a low power of the miscroscope; finally cut off a very small portion of the root with its hairs and examine in water with a power of 160 to 200 diameters.* Make several sketches of the root-hairs and compare with Figs. 5 and 19. Notice that they do not cover all portions h—. Fig. 3. —Lengthwise Section througli Tip of a Eoot of Barley. (Muchmagnified.) a, thick outer wall of epidermis; b (portion bounded hy the heavy Une), the central cylinder of the root; c, the growing-point,
. Elements of botany. Botany; Botany. THE PARTS OF THE SEEDLING. 13 ing glass, then as opaque objects in a cell under a low power of the miscroscope; finally cut off a very small portion of the root with its hairs and examine in water with a power of 160 to 200 diameters.* Make several sketches of the root-hairs and compare with Figs. 5 and 19. Notice that they do not cover all portions h—. Fig. 3. —Lengthwise Section througli Tip of a Eoot of Barley. (Muchmagnified.) a, thick outer wall of epidermis; b (portion bounded hy the heavy Une), the central cylinder of the root; c, the growing-point, from which the root-cap is produced (in tliis and similar plants) and from which growth in length proceeds ; d, loose cells of the root-cap. of the rootlets. Where are they most abundant ? Observe that each hair is in reality a very slender tube, closed at the ends, and with walls of extreme thinness. The root-hairs in plants growing under ordinary conditions 1 Great care is needed to prevent the root-hairs from becoming distorted by pressure, and they shrivel up in dry air almost at 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: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1896
