Light micrograph of Desmidium swartzii freshwater filamentous green algae. Cells are triradiate in end view. The filaments appear to be twisted because the axes of adjacent cells are offset by a slight angle. Culture material of the Culture Collection of Algae at the University of Cologne, Germany. Microscopic contrast method : Differential interference contrast. Magnification 100x when printed at 10 centimetres wide.
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