. Practical botany. Botany. THE GBEEN ALG^ (CHLORoPHVCE^) 195 extensively branched (Fig. 158). ^Mien gi'owing vigorously, new branches are constantly being formed at the upper ends of some of tlie segments. Each segment appears to be one cell, though really a good many nuclei with their ac- companying masses of cyto- plasm are contained within each wall. Such a structure is called a coenocyte, and though this same condition is found in another plant that we shall study (J'uucheria, Sect. 188), it is not common in the plant kingdom. For our purpose we may think of each segment of Oladopliora as
. Practical botany. Botany. THE GBEEN ALG^ (CHLORoPHVCE^) 195 extensively branched (Fig. 158). ^Mien gi'owing vigorously, new branches are constantly being formed at the upper ends of some of tlie segments. Each segment appears to be one cell, though really a good many nuclei with their ac- companying masses of cyto- plasm are contained within each wall. Such a structure is called a coenocyte, and though this same condition is found in another plant that we shall study (J'uucheria, Sect. 188), it is not common in the plant kingdom. For our purpose we may think of each segment of Oladopliora as like one cell. All of these branching segments may to- gether compose a plant of great size as compared with the smaller dimensions of a Nostor, an Oscil- latoria, a Pleuro- i-oecuis, or even a Spirogyra. In each seg- ment there are many small clilo- roplasts, crowded together so closely as to present an almost solid green color even when viewed under considerable Fig. 158. Branching of Cladophora After Collins. 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; Caldwell, Otis William, 1869- joint author. Boston, New York [etc. ] Ginn and company
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