. Morphology of gymnosperms. Gymnosperms; Plant morphology. 185 Figs. 183-185.—Dioon edule: development of proembryo; fig. 183, base of proembryo, showing character of segmentation at a stage when the entire egg is seg- mented; X108; fig. 184, diagram of entire proembryo at the stage shown in fig. 183; the segmentation is disappearing in the upper region; X20; fig. 185, permanent walls at the base, but as yet no differentiation into regions; free nuclei above; membrane (m) of egg not yet ruptured; X108.—After Chamberlaxn CvqI,. Please note that these images are extracted from scanned page imag
. Morphology of gymnosperms. Gymnosperms; Plant morphology. 185 Figs. 183-185.—Dioon edule: development of proembryo; fig. 183, base of proembryo, showing character of segmentation at a stage when the entire egg is seg- mented; X108; fig. 184, diagram of entire proembryo at the stage shown in fig. 183; the segmentation is disappearing in the upper region; X20; fig. 185, permanent walls at the base, but as yet no differentiation into regions; free nuclei above; membrane (m) of egg not yet ruptured; X108.—After Chamberlaxn CvqI,. 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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