. Morphology of gymnosperms. Gymnosperms; Plant morphology. Figs. 289-292.—Pinus Laricio: development of the archegonium; fig. 289, arche- gonium initial, May 28; fig. 290, neck and central cells, June 2; fig. 291, central cell just before cutting oflE ventral canal cell, June 18; fig. 292, cutting off ventral canal cell, June 21; X104. (28), including the bodily transfer of their nuclei. In this way the central cell and egg were thought to be packed with food, their cyto- plasm being filled with large and deeply staining masses (more promi- nent in the egg) which were regarded as the nuclei c
. Morphology of gymnosperms. Gymnosperms; Plant morphology. Figs. 289-292.—Pinus Laricio: development of the archegonium; fig. 289, arche- gonium initial, May 28; fig. 290, neck and central cells, June 2; fig. 291, central cell just before cutting oflE ventral canal cell, June 18; fig. 292, cutting off ventral canal cell, June 21; X104. (28), including the bodily transfer of their nuclei. In this way the central cell and egg were thought to be packed with food, their cyto- plasm being filled with large and deeply staining masses (more promi- nent in the egg) which were regarded as the nuclei contributed by the jacket cells. Even after Steasbukger had shown that these deeply staining masses are not nuclear in nature, but that the best organized are the so-called "proteid vacuoles," Arnoldi (55) described the behavior of the migrating nuclei, reporting them to become amoeboid in the jacket cells, to squeeze through the pits, and to regain their form in the central cell and egg. Nuclei were also. 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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