The Structure And Development of Mosses And Ferns Archegoniatae
The book The Structure And Development of Mosses And Ferns Archegoniatae was written by author Campbell Douglas Houghton Here you can read free online of The Structure And Development of Mosses And Ferns Archegoniatae book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Structure And Development of Mosses And Ferns Archegoniatae a good or bad book?
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Development of the archegonium. A, Optical section of the very young archegonial meristem, X22S; B-E, longitudinal sections of young archegonia, X45OJ c, neck canal cell; v, ventral canal cell; o, egg. it is borne grows for some time by a definite apical cell, which is very evident in horizontal sections (Fig. 263, C). The development of the archegonium most nearly resembles that of the eusporangiate Ferns. Usually, but not always, no basal cell is formed, and the first division in the inner ce...ll sepa- rates the neck canal cell from the central cell. Both neck and ventral canal cells (Fig. 262, E) equal in breadth the central cell, and in this respect are most like the Marattiacese. The neck canal cell later grows up between the neck cells, but there is usually a space between its summit and the terminal neck 452 MOSSES AND FERNS CHAP. cells, which here are much longer than the others. It subse- quently divides by a transverse wall, as may happen in the Marattiacese and occasionally in Osmunda, but whether this always takes place is not certain (Fig.
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