. Plant life, considered with special references to form and function. Plant physiology. G. 4. Fig. 3. — A cell frnm the interior of the leaf of the oat, showing: its wall, and some inclusions of the cytoplasm, z, the nucleus; i:, chloroplasts; c, an oil-drop. Mag- nified about TOO diani —After Zimmermann. Fig. 4.—A, chloroplasts from the skin of the petiole of ivy; />', from the inner leaf- cells of morning-glory; C, from the same cells of Achyrantlies. The shaded parts are protoplasm in which are embedded starch-granules, s^ and proteid crystalloids, k. Magnified about looo diam. —
. Plant life, considered with special references to form and function. Plant physiology. G. 4. Fig. 3. — A cell frnm the interior of the leaf of the oat, showing: its wall, and some inclusions of the cytoplasm, z, the nucleus; i:, chloroplasts; c, an oil-drop. Mag- nified about TOO diani —After Zimmermann. Fig. 4.—A, chloroplasts from the skin of the petiole of ivy; />', from the inner leaf- cells of morning-glory; C, from the same cells of Achyrantlies. The shaded parts are protoplasm in which are embedded starch-granules, s^ and proteid crystalloids, k. Magnified about looo diam. — After Zimmermann. Fig. 5.—Leucoplasts from a young shoot of Canna. The shaded part is protoplasm in which are embedded starch-grains, s, and proteid crystalloids, k. Magnitied about 1000 diam.—After Schimper. 8. Plastids.—In most cells there are also other protoplas- mic structures, \\\<i pladiJs. In young cells these are small, rounded, colorless bodies. As the cell growls older they in- crease in size and number. \V maturity, in cells which lie near the surface of green plants, they are commonly roundish or biscuit-shaped, of spongy texture, and colored yellowish-. 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 Barnes, Charles Reid, 1858-1910. New York, H. Holt & company
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