Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 644
nally double, one layer springing from the outer,and the other from the inner, of two layers of cells which may bealways distinguished in the immature sporange; but one or other ofthese is frequently wanting at the time of maturity, and sometimesboth are obliterated, so that there is no peristome… … Fig. 454.—Double peristome of Fig. 455.—Double peristome Bryum intermedium. , of Cinclidium arcticum. upper part of the sporange, where they are clustered round a centralpillar, which is termed the columel. In the young sporange thewhole mass is nearly solid (fig. 450, C), the space (!) in which…
Microscopy
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