Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells.
Species: Trichome pale bluegreen, or yellowish green, septum not constricted, not attenuated
toward ends, both ends rounded, 2.5-4 μm long, 2.5-3.5 μm wide;
cell body containing granules
(Illustrations of The Japanese Fresh-water Algae, 1977).
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