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Zygnema - a type of algae from the greens. Occurs in the fresh water of Eurasia, Africa and America. Characteristic
The filamentous pleura, made up of cylindrical cells (10 to 50 μm in diameter), contains two starch chloroplasts with one pyrethroid each. Sexual reproduction occurs through conjugation, usually ladylike, sometimes also lateral, mostly anisogamous. Zygospora surrounded by a triple membrane. In winter, aplanospores and spore spores are often produced. Bibliography
Joanna Zofia Kadłubowska: Freshwater Flora of Poland. T. 12A. Zygnemaceae Eczema. Cracow: PWN, 1972.
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