. Morphology of gymnosperms. Gymnosperms; Plant morphology. CYCADALES I4S cilia that pass through the outer border of the sperm and project for some distance. It has been claimed that the two cells formed by the division of the body cell become ciliated and are themselves the sperms. Ikeno. Figs. 170-172.—Sperms of cycads, represented as not formed within mother cells, but as consisting of the entire transformed halves of body cells: fig. 170, Zamia; pollen tube with sperms just before they begin to swim; X90; fig. 171, Cycas revoluia; the sperms at the beginning of movement; fig. 172, Cycas r
. Morphology of gymnosperms. Gymnosperms; Plant morphology. CYCADALES I4S cilia that pass through the outer border of the sperm and project for some distance. It has been claimed that the two cells formed by the division of the body cell become ciliated and are themselves the sperms. Ikeno. Figs. 170-172.—Sperms of cycads, represented as not formed within mother cells, but as consisting of the entire transformed halves of body cells: fig. 170, Zamia; pollen tube with sperms just before they begin to swim; X90; fig. 171, Cycas revoluia; the sperms at the beginning of movement; fig. 172, Cycas revoluta; the sperms swim- ming freely in the tube; —Fig. 170, after Webber (32); figs. 171, 172, after MiYAKE (48). (27) described the sperms of Cycas as perfectly naked, and Webber (32) found the same condition in Zamia, where he was unable to find any inclosing mother cell, although he looked for it. Miyake (48) also looked for an inclosing cell in Cycas and saw a thin mem-. 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 Coulter, John Merle, 1851-1928; Chamberlain, Charles Joseph, b. 1863; Coulter, John Merle, 1851-1928. Morphology of spermatophytes. Part I. Gymnosperms. Chicago, University of Chicago Press
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