. Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. THE MALE GAJ1ET0PHYTE 100 " prothallial " nucleus. This older view is the one given in Goebel's Outlines of Classification and Special Morphology. In 1S8-A Strasburger 12 recognized the real nature of the two nuclei and interchanged the names, applying them as they have been used ever since. We have substituted the name " tube-nucleus " for " vegetative nucleus," not only because the development of the tube is its most conspicuous function, but also because it is. v
. Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. THE MALE GAJ1ET0PHYTE 100 " prothallial " nucleus. This older view is the one given in Goebel's Outlines of Classification and Special Morphology. In 1S8-A Strasburger 12 recognized the real nature of the two nuclei and interchanged the names, applying them as they have been used ever since. We have substituted the name " tube-nucleus " for " vegetative nucleus," not only because the development of the tube is its most conspicuous function, but also because it is. vs * Fig. 62.—Cypripedium spectabile. Section of microsporangium, showing microspores in various stages of division into tube and generative nuclei; although the divisions are nearly simultaneous throughout the microsporangium, it will be seen that in some cases the nuclei are in the spirem stage, while in others the tube and genera- tive nuclei are easily distinguished ; x 300. not the morphological equivalent of the vegetative or prothallial cells of the Gymnosperms and heterosporous Pteridophytes. A generative cell is formed by the more or less distinct or- ganization of the cytoplasm about the generative nucleus. This cell usually lies free in the body of the spore, but is often cut off by a distinct wall, as in Typha (Schaffner 31), Sparganium (Campbell43), Naias (Campbell29), Convallaria (Wiegand45), Neottia (Guignard 9), Populus (Chamberlain30), Asclepias. 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. New York, D. Appleton
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