. Botany of the living plant. Botany; Plants. Fig. 279A. A, Oscillatoria princeps : a terminal portion of a filament; b, portions from the middle of a filament, properly fixed and stained ; t, cells in division. (x 1080.) a, UsctUatona Froeiichii. ( x 540.) (From Strasburger.) The filaments, which are unattached, may break up at any point into several shorter lengths ; but in other cases special cells (hetero- cysts) occur at intervals in the filaments, which appear to determine their brewing up into shorter lengths, as in Nostoc or Rivularia. Some of these fission-Algae take part in the forma
. Botany of the living plant. Botany; Plants. Fig. 279A. A, Oscillatoria princeps : a terminal portion of a filament; b, portions from the middle of a filament, properly fixed and stained ; t, cells in division. (x 1080.) a, UsctUatona Froeiichii. ( x 540.) (From Strasburger.) The filaments, which are unattached, may break up at any point into several shorter lengths ; but in other cases special cells (hetero- cysts) occur at intervals in the filaments, which appear to determine their brewing up into shorter lengths, as in Nostoc or Rivularia. Some of these fission-Algae take part in the formation of Lichens : thus Collema has Nostoc as its Algal constituent. Others, such as. 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 Bower, F. O. (Frederick Orpen), 1855-1948; Wardlaw, C. W. (Claude Wilson), 1901-. London, Macmillan and Co. , ltd.
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