. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig- 32.—Sph(srocarpus sp (?). A, B, Median longitudinal sections of the arche- gonium venter, with enclosed embryos, X260; C, an older sporogonium in median section, X260; D, a, still later stage, showing the large space between the arche- sporial cells and the wall, XSs. rows of cells. As the calyptra grows the upper part becomes divided into two layers, the part surrounding the foot into three. Instead of breaking through the calyptra at maturity,. Please note that these images are extr

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. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig- 32.—Sph(srocarpus sp (?). A, B, Median longitudinal sections of the arche- gonium venter, with enclosed embryos, X260; C, an older sporogonium in median section, X260; D, a, still later stage, showing the large space between the arche- sporial cells and the wall, XSs. rows of cells. As the calyptra grows the upper part becomes divided into two layers, the part surrounding the foot into three. Instead of breaking through the calyptra at maturity,. 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;

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Keywords: ., bookauthorcampbelldouglashought, bookcentury1900, bookdecade1910