. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 02 MOSSES AND FERNS CHAP. later showing a division into ventral and dorsal cells. Prob- ably this type has been derived from the former by a gradual increase in the size of the angle formed by the dorsal and ven- tral walls of the apical cell, which finally became so great as to practically form one plane. Th6 antheridium of Pellia is larger than that of Aneura, but its' development is very similar except that the stalk is multicellular, as it is in the; other An^crogynse. The sperma- tozoids
. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 02 MOSSES AND FERNS CHAP. later showing a division into ventral and dorsal cells. Prob- ably this type has been derived from the former by a gradual increase in the size of the angle formed by the dorsal and ven- tral walls of the apical cell, which finally became so great as to practically form one plane. Th6 antheridium of Pellia is larger than that of Aneura, but its' development is very similar except that the stalk is multicellular, as it is in the; other An^crogynse. The sperma- tozoids of Pellia (Fig. 40, D, E), are much larger than those of Aneura, but are exceeded in size by those of the allied genus Mafewoa (Miyake (2)).. 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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