. Fresh-water biology. Freshwater biology. 112 FRESH-WATER BIOLOGY 57 (58) Branches generally arising in pairs Scytonema Filaments consisting of vegetative cells and heterocysts; borne singly in a sheath; sheath tough, lamellose, frequently yellowish or brownish in color; false branches borne generally in pairs between the heterocysts. Forming felt-like masses on wet rocks, etc. Fig. 59. Scytonema mirabile Thuret. X 465. (Original.) 58 (57) Branches arising as a rule singly Tolypothrix Kiitzing. Filaments resembling closely those of Scytonema, but false branches arising singly as a ru
. Fresh-water biology. Freshwater biology. 112 FRESH-WATER BIOLOGY 57 (58) Branches generally arising in pairs Scytonema Filaments consisting of vegetative cells and heterocysts; borne singly in a sheath; sheath tough, lamellose, frequently yellowish or brownish in color; false branches borne generally in pairs between the heterocysts. Forming felt-like masses on wet rocks, etc. Fig. 59. Scytonema mirabile Thuret. X 465. (Original.) 58 (57) Branches arising as a rule singly Tolypothrix Kiitzing. Filaments resembling closely those of Scytonema, but false branches arising singly as a rule instead of in pairs, as outgrowths in the region of the heterocysts; the latter 1-5 in a row; spores (in a few species) elliptical, borne singly or in rows. Occurring among various aquatic plants in ponds and lakes. Fig. 60. Tolypothrix lanata Wart- mann. X 465. (Original.). 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 Ward, Henry Baldwin, 1865-1945; Whipple, George Chandler, 1866-1924. joint author. New York, John Wiley & sons, inc. ; [etc. ,etc. ]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
