Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells. Species: Trichome pale bluegreen, septum not constricted, gradually attenuated toward curved ends, 3-3.5 μm wide, slightly elongate or nearly the same as its width; cell body containing granules (Illustrations of The Japanese Fresh-water Algae, 1977).

31 μm 63 μm 94 μm; x 640