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).
P. duplex x 640 |
P. duplex x 640 |
P. boryanum |
P. tetras |
Pediastrum sp. |
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