. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig. 228.—Alsophila Cooperi. A, section of the stipe, Xi^; B, cross-section of leaflet, showing the sori, X20; C, open sporangium. The Cyatheace^ These are all Ferns of large size, some of them Tree-Ferns, ID metres or more in height. They occur in the tropics of both hemispheres, and some of them, e. g., Dicksonia antarctica, are also found in the extra-tropical regions of the southern hemisphere. They correspond so closely in all respects with the typical Polypodiaceae that, except for the s

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. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig. 228.—Alsophila Cooperi. A, section of the stipe, Xi^; B, cross-section of leaflet, showing the sori, X20; C, open sporangium. The Cyatheace^ These are all Ferns of large size, some of them Tree-Ferns, ID metres or more in height. They occur in the tropics of both hemispheres, and some of them, e. g., Dicksonia antarctica, are also found in the extra-tropical regions of the southern hemisphere. They correspond so closely in all respects with the typical Polypodiaceae that, except for the slightly different annulus, they might be placed in that family. In some form,?,. 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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