Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:
Oscillatoria sp.
or Lyngbya ?
1.5 x 2.5 μm φ
L/W=0.6
Toneri Park
Tokyo, 2001
Oscillatoria sp. ?
2.5 μm φ
L/W=
Kanayama Green p.
Kiyose
Tokyo, 2003
