. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig. ^g.^—Amblystegium riparium^ var. Huitans. A, Longitudinal section of the stem passing through a young lateral branch (fe) ; h, hair at the base of the subtending leaf; B, horizontal section of a very young leaf, showing the apical cell ix); C, ,D, transverse sections of young leaves, showing the development of the midrib. All-the figures XS^S- on the outer side being larger than the others. In the former the next wall is a periclinal one and divides the cell into an inner and an outer one
. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig. ^g.^—Amblystegium riparium^ var. Huitans. A, Longitudinal section of the stem passing through a young lateral branch (fe) ; h, hair at the base of the subtending leaf; B, horizontal section of a very young leaf, showing the apical cell ix); C, ,D, transverse sections of young leaves, showing the development of the midrib. All-the figures XS^S- on the outer side being larger than the others. In the former the next wall is a periclinal one and divides the cell into an inner and an outer one. From the two inner cells by further division is formed the group of small conducting cells that traverse the centre of the midrib, while the outside cells together with those on the inner side of the midrib become much thickened and serve for strengthening the leaf. As in Amblystegium the lamina of the leaf remains single-layered, and its cells contain numerous large chloroplasts which, as is well-known, continue. 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
