. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. FlG. 227.—Cibotium Memiesii. A, Pinnule with the sori is), X3; B, a single sorus showing the two-valved indusium, X9;- C, a single sporangium, X80; r, the annulus; D, a paraphysis, X8o. dium, less so in Schiscea, where the sporangia are smaller, and the mother cells project much more strongly. The early divi- sions correspond closely with those of the Hymenophyllaceas, and as there the tapetum is massive and two-layered, and the stalk of the sporangium very short. The wall is derived in The di

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. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. FlG. 227.—Cibotium Memiesii. A, Pinnule with the sori is), X3; B, a single sorus showing the two-valved indusium, X9;- C, a single sporangium, X80; r, the annulus; D, a paraphysis, X8o. dium, less so in Schiscea, where the sporangia are smaller, and the mother cells project much more strongly. The early divi- sions correspond closely with those of the Hymenophyllaceas, and as there the tapetum is massive and two-layered, and the stalk of the sporangium very short. The wall is derived in The divisions in the wall are too complicated to be explained withotit numerous figures. See Prantl's figures, Plate :. 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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