Genus:
Two chloroplasts with axis and laminae structure;
axis short, laminae also short making the chloroplasts star-shaped
Species: Cell body cylindrical, large, 20-87 μm long, 11-35 μm wide
(Photomicrographs of the Fresh-water Algae, 1984).
[var. brebissonii]: Cell body cylindridal with both round ends, 30-87 μm long,
14-35 μm wide, L/W=2-4; chloroplasts star-shaped, with a single pyrenoid.
(Illustrations of The Japanese Fresh-water Algae, 1977).
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