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Cyanophyceae: Nostocales: Oscillatoriaceae

 Oscillatoria tenuis
var. asiatica Wille

Species [ var. tenuis Agardh ]: Trichome straight, bluegreen, slightly curved at terminal, 2.5-5 μm long, 4-10 μm wide, L/W=1/3 (0.3); septum slightly constricted, granules present along septum; apical cells semispherical, its wall sometimes thickened.
[ var. asiatica Wille ]: 4.5-6 μm long, 10-12 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).

Oscillatoria tenuis Agardh var. asiatica Wille ?, cell body 5.5 μm long, 14 μm wide, L/W=0.4, x 640, Sakitama-kofun park (Sakitama tumuli park), Gyoda city, Saitama Pref., Japan, October 17, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Oscillatoria Oscillatoria Oscillatoria Oscillatoria

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