. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig. 6^,—Anthoceros fusiformis. A, Young plant with single growing point (.x)t X85; B, horizontal section of the growing point of a similar plant, X525; x^ the single apical cell; C, similar section of a growing point from an older plant, with pos- sibly more than one initial cell> X260; D, a mucilage slit from the ventral side of the thallus, XS^S- mucilage filling it. This mucilage escapes through the clefts and covers the growing point in the same way as that secreted 'by the glandular h

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. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig. 6^,—Anthoceros fusiformis. A, Young plant with single growing point (.x)t X85; B, horizontal section of the growing point of a similar plant, X525; x^ the single apical cell; C, similar section of a growing point from an older plant, with pos- sibly more than one initial cell> X260; D, a mucilage slit from the ventral side of the thallus, XS^S- mucilage filling it. This mucilage escapes through the clefts and covers the growing point in the same way as that secreted 'by the glandular hairs in the 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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