. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. S44 MOSSES AND FERNS CHAP. than in Marattia, the neck canal cell is shorter and extends but little between the neck cells (Fig. 313, B). The is very large, round or oval in form, and the nucleus contains a large nucleolus that stains very intensely, but otherwise shows little chromatin. The receptive spot is of unusual size, and occupies about one-third of the &gg. It is. Fig. 3ii.—Isoeies eehinospora var. Braunii. Development of the archegonium, X500; 0, the e^g', V, ventral canal ce
. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. S44 MOSSES AND FERNS CHAP. than in Marattia, the neck canal cell is shorter and extends but little between the neck cells (Fig. 313, B). The is very large, round or oval in form, and the nucleus contains a large nucleolus that stains very intensely, but otherwise shows little chromatin. The receptive spot is of unusual size, and occupies about one-third of the &gg. It is. Fig. 3ii.—Isoeies eehinospora var. Braunii. Development of the archegonium, X500; 0, the e^g', V, ventral canal cell; A, neck canal cell; D, shows a two-celled embryo within the archegonium. almost hyaline, showing, however, a faint reticulate arrange- ment of fine granules; the lower portion of the egg is filled with granules that stain strongly. In /. lacustris, according to Hofmeister, only one arche- gonium is formed at first, and if this is fertilised, no others are produced; but in /. eehinospora, even before the first arche- gonium is complete, two others begin to develop and reach ma- turity shortly after the first, whether the latter is fertilised or. 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 Campbell, Douglas Houghton, 1859-1953. New York, The Macmillan Company;
Size: 1583px × 1577px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcampbelldouglashought, bookcentury1900, bookdecade1910
