. Elements of botany. Botany. CHAPTER VII STRUCTURE OF THE STEM STEM OF MONOCOTYLEDONOUS PLANTS 81. Gross Structure. â Refer back to the sketches of the corn- seedling to recall sometliiDg of the early history of the corn-stem. Study the external appearance of a piece of corn-stem or bamboo t^vo feet or more in length. Kote the character of the outer surface. Sketch the whole piece and label the enlarged nodes and the nearly cylindrical inler- nodes. Cut across a corn-stem and examine the cut surface â with the magnifying glass. Make some sections as thin as they can be cut and examine â svith
. Elements of botany. Botany. CHAPTER VII STRUCTURE OF THE STEM STEM OF MONOCOTYLEDONOUS PLANTS 81. Gross Structure. â Refer back to the sketches of the corn- seedling to recall sometliiDg of the early history of the corn-stem. Study the external appearance of a piece of corn-stem or bamboo t^vo feet or more in length. Kote the character of the outer surface. Sketch the whole piece and label the enlarged nodes and the nearly cylindrical inler- nodes. Cut across a corn-stem and examine the cut surface â with the magnifying glass. Make some sections as thin as they can be cut and examine â svith the magnifying glass (holding them up to the light) or with a dissecting microscope. Note the firm rind composed of tlie epitiermis and underlying tissue, the large mass of pith -pj,, composing the main bulk of the stem, and the many little ex harder and more opaque spots, which are the cut-off ends of the woody threads known as fibro-vascular bundles (Fig. .38, cc). Split a portion of the stem lengthwise into thin translucent slices and notice whether the bundles seem to run straight up and down 65. 38. Diagrammatic Cross-Section of Stem of Indian Corn. , fibro-vascular bundles ; gc, pithy material between 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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