. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. XI LEPTOSPORANGIAT^ HETEROSPOREJE 42s: is unusually small in Marsilia, which otherwise resembles Pihilaria. The phenomena of fecundation are very striking in the Marsiliaceae. The mucilaginous layer .about the macrospore attracts and retains the spermatozoids, which collect by hun- dreds about it. The mucilage above the archegonium forms. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of the

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. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. XI LEPTOSPORANGIAT^ HETEROSPOREJE 42s: is unusually small in Marsilia, which otherwise resembles Pihilaria. The phenomena of fecundation are very striking in the Marsiliaceae. The mucilaginous layer .about the macrospore attracts and retains the spermatozoids, which collect by hun- dreds about it. The mucilage above the archegonium forms. 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