. Elementary botany. Botany. Fig. 116. Coleoch^ete soluta; at left branch bearing oogonium (oog)\ antheridia (nnt); egg in oogonium and surrounded by enveloping threads ; at center three antheridia open, and one spermatozoid ; at right sporocarp, mature egg inside sporocarp wall. cell elongates into a slender tube which opens at the end to form a channel through which the spermatozoid may pass down to the egg. The egg is formed of the contents of the cell (fig. 116). Several oogonia are formed on one plant, and in such a plant as C. scutata they are formed in cl ring near the margin of the dis
. Elementary botany. Botany. Fig. 116. Coleoch^ete soluta; at left branch bearing oogonium (oog)\ antheridia (nnt); egg in oogonium and surrounded by enveloping threads ; at center three antheridia open, and one spermatozoid ; at right sporocarp, mature egg inside sporocarp wall. cell elongates into a slender tube which opens at the end to form a channel through which the spermatozoid may pass down to the egg. The egg is formed of the contents of the cell (fig. 116). Several oogonia are formed on one plant, and in such a plant as C. scutata they are formed in cl ring near the margin of the disk. 262. Antheridia.—In C. scutata certain of the cells of the plant divide into four smaller cells, and each one of these becomes an antheri- sporocarp ruptured by<ii"™- I" C. soluta the an- growth of egg to form cell theridia grow out from the mass. Cells of this sporo- , , .,,,., phyte forming zoospores. end oi terminal cells m the 7, it8, C. scutata. : form short flasks, some- times four in number or less (fig. 116). A single spermatozoid is formed from the contents. It is and possesses two long cilia. After swim-. 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 Atkinson, George Francis, 1854-1918. New York, H. Holt
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