Potamogeton ochreatus Raoul
Leaves all submersed, sessile, linear-oblong, 2-5 mm wide, flat, with numerous fine longitudinal nerves; stipules free, disintegrating into fibres. Spike to 1.5 cm long, dense. Achenes flattened with ± 3-ridged keel, beak well-developed, curved.
N., S., A. In open, sometimes slow-moving waters.
FL. 11-2-(4). FT. 12-3-(4).