. Fresh-water biology. Freshwater biology. Fig. 237. Microthamnion kutsingianum Nageli. (Original.) X600. 244 (243, 24s). Plant coarse, irregularly branched, partly erect and partly creeping on stones and trees; when aerial, often colored red by haematochrome. Membrane thick; reproduction by zoospores and gametes Trentepohlia Martins. Chromatophores many, irregular discs, without pyre- noids; gametangia and zoosporangia mostly terminal; gametes and zoospores similar, being egg-shaped, with Jwo cilia and haematochrome, but no definite pigment spot. A palmella condition may occur. These are some
. Fresh-water biology. Freshwater biology. Fig. 237. Microthamnion kutsingianum Nageli. (Original.) X600. 244 (243, 24s). Plant coarse, irregularly branched, partly erect and partly creeping on stones and trees; when aerial, often colored red by haematochrome. Membrane thick; reproduction by zoospores and gametes Trentepohlia Martins. Chromatophores many, irregular discs, without pyre- noids; gametangia and zoosporangia mostly terminal; gametes and zoospores similar, being egg-shaped, with Jwo cilia and haematochrome, but no definite pigment spot. A palmella condition may occur. These are sometimes referred to as the aerial algae because they exist principally in the air and form often bright-colored incrustations on the bark of trees and stones. They are not infrequently found in connection with lichen fungi. As the Trentepohlias are principally aerial, the lib- eration of the zoospores and gametes can occur only at the time of a rain or in the presence of a heavy dew. Fig. 23S. Trentepohlia wainoi Hariot. X 125. (After Collins and Hariot.). 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
