Chlorophyta: Chlorophyceae: Chlorococcales: Hydrodictyaceae

 Pediastrum boryanum
(Turpin) Meneghini, 1840

Pediastrum Genus: Colonies of fixed number of cells, flat, circular in shape; cell body polygonal in shape, with horn-like projections; cell wall garanulated, wrinkled or notched; chloroplasts plate-like or reticular; asexual reproduction by zoospore; sexual reproduction by isogametes (Illustrations of The Japanese Fresh-water Algae, 1977).

Pediastrum boryanum, a colony of 16 cells, x 400, x 640, Aug. 7-13 1999, Vermont-Maine U.S.A., by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640

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