. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig. 44-—Fossombronia longiseta. Development of the archegonium,,longitudinal sec- tion, X525; drawings made by Mr. H- B. Humphrey. is not free, and the central cell is below the level of the super- ficial cells of the thallus. The archegonium neck is short, and the basal part as well as that part of the venter which is free, t^o cells thick (Fig. 40, C). The number of neck cells is sjiiall (apparently about four), but whether the number is con- sjant,<;annpt be stated positively. The femal

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. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig. 44-—Fossombronia longiseta. Development of the archegonium,,longitudinal sec- tion, X525; drawings made by Mr. H- B. Humphrey. is not free, and the central cell is below the level of the super- ficial cells of the thallus. The archegonium neck is short, and the basal part as well as that part of the venter which is free, t^o cells thick (Fig. 40, C). The number of neck cells is sjiiall (apparently about four), but whether the number is con- sjant,<;annpt be stated positively. The female branch remains. 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