. A textbook of botany for colleges and universities ... Botany. PTERIDOPHYTES 129 outermost one of this row of cells, they are called primary neck cell, central cell, and hasal cell. The primary neck cell, by successive divi- sions, develops a neck consisting of several tiers of cells ( 284- 286), with four cells in each tier. The central cell develops the axial row as follows: the first transverse division results in the primary neck canal cell (the outer one) and the primary ventral cell (the inner one, fig. 285). By successive transverse divi- sions, the primary neck canal cell produ


. A textbook of botany for colleges and universities ... Botany. PTERIDOPHYTES 129 outermost one of this row of cells, they are called primary neck cell, central cell, and hasal cell. The primary neck cell, by successive divi- sions, develops a neck consisting of several tiers of cells ( 284- 286), with four cells in each tier. The central cell develops the axial row as follows: the first transverse division results in the primary neck canal cell (the outer one) and the primary ventral cell (the inner one, fig. 285). By successive transverse divi- sions, the primary neck canal cell produces a variable. Fig. 277.— Gameto- phyte {g) of Lycopodium annotinum (entirely tuber- ous and subterranean), bearing a young sporo- phyte {s, I); the ground line is shown. — After 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 Coulter, John Merle, 1851-1928; Barnes, Charles Reid, 1858-1910, joint author; Cowles, Henry Chandler, 1869- joint author. New York, Cincinnati [etc] American book company


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