. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 198 MOSSES AND FERNS the antheridium ripens, these gradually assume a bright orange- red colour. The development of the stalk varies in different cases. Sometimes it consists of a row of several cells, some- times the antheridium is almost sessile. The lowermost seg-. FlG, 103.—Funaria hygrometrica. A, Antheridium that has just discharged the mass of sperm cells (B), X300; C, spermatozoids, X1300; D, paraphysis, X300; E, male "flower" of Atrichum iindulatum, X6. ments of the apical c
. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 198 MOSSES AND FERNS the antheridium ripens, these gradually assume a bright orange- red colour. The development of the stalk varies in different cases. Sometimes it consists of a row of several cells, some- times the antheridium is almost sessile. The lowermost seg-. FlG, 103.—Funaria hygrometrica. A, Antheridium that has just discharged the mass of sperm cells (B), X300; C, spermatozoids, X1300; D, paraphysis, X300; E, male "flower" of Atrichum iindulatum, X6. ments of the apical cell help to form the upper part of the stalk, and sometimes the two lowest seem to take no part in the formation of the sperm cells. There is no absolute uniformity in the cell divisions of the stalk, which varies in the arrange-. 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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