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Gamophyceae: Zygnematales: Zygnemataceae

 Spirogyra varians
(Hassall) Kützing

Spirogyra varians Genus: Filament without branching; cell body cylindrical; one or several chloroplasts band-shaped, spirally arranged within the cell, pyrenoids present; septum with or without folded structure (Guide book to the "Photomicrographs of the Freshwater Algae", 1998). About 300 species (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Vegetative cells 30-70 μm long, 30-38 μm wide; a single chloroplast making 1-4 turns in each cell; conjugation scalariform; female gametangium swelled toward male gametangium; zygospores ellipsoidal or broad ellipsoidal or spherical in shape (45-65 μm long, 30-35 μm wide) (Illustrations of The Japanese Fresh-water Algae, 1977).

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Spirogyra varians (Hassall) Kützing, vegetative cells μm long, 35 μm diam., one band-form chloroplast making 3.5 turns in each cell, x 100, x 200, x 400, Awayatsu park, Fujimi city, Saitama Pref., Japan, May 17, 2000 by Y. Tsukii
scale 100 μm scale 200 μm scale 300 μm; x 200 : scale 50 μm scale 100 μm scale 150 μm; x 400
Spirogyra Spirogyra Spirogyra Spirogyra
x 640
Spirogyra Spirogyra
Conjugation, x 100, x 200, x 400
Spirogyra Spirogyra Spirogyra Spirogyra
Conjugation, x 100, x 200, x 400, x 640
Spirogyra Spirogyra Spirogyra Spirogyra Spirogyra
Conjugation, x 100, x 200, x 400, x 640
Spirogyra Spirogyra Spirogyra Spirogyra

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