. Morphology of gymnosperms. Gymnosperms; Plant morphology. CYCADALES 119 II chromosomes, and in one case 13 chromosomes; in Zamia 25 nuclei were examined and all showed 12 chromosomes. Chamber- lain (46, 63) found 12 chromosomes in the pollen mother cells of Dioon edule, 12 at the mitosis which gives rise to the ventral canal and egg nuclei, and 12 in cells of the endosperm.. 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 work..
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