. Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. THE FEMALE GAMETOPHYTE 89 great obscurity, and very little has been added to the original suggestions concerning it. The most important departure from the ordinary history is that shown by Peperomia pellucida, as described by Camp- bell 70 and Johnson70 (Fig. 38), Gunnera (Schnegg 103), Tril- lium (Ernst116), and Tulipa as described by In Peperomia the nuclei of the embryo-sac do not show any of the polarity that is so marked a feature in other forms. The first four nuclei are large
. Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. THE FEMALE GAMETOPHYTE 89 great obscurity, and very little has been added to the original suggestions concerning it. The most important departure from the ordinary history is that shown by Peperomia pellucida, as described by Camp- bell 70 and Johnson70 (Fig. 38), Gunnera (Schnegg 103), Tril- lium (Ernst116), and Tulipa as described by In Peperomia the nuclei of the embryo-sac do not show any of the polarity that is so marked a feature in other forms. The first four nuclei are large, and arranged peripherally like the spores of a tetrad. Divisions continue until sixteen parietal nuclei, rather evenly distributed, are found in the sac. One of the nuclei at the micropylar end of the sac becomes somewhat larger and is surrounded by a fairly defined mass of cytoplasm with a limiting membrane, this cell functioning as the egg. Another micropylar cell is similarly organized, and from its position. 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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Keywords: ., bookauthorcoulterj, bookcentury1900, bookdecade1900, bookyear1903
