131248 BOG PONDWEED Potamogeton polygonifolius (Potamogetonaceae) Aquatic. Freshwater perennial of heath and moorland pools with acid waters. FLOWERS are greenish; borne in 4cm-long spikes on long stalks (May-Oct). FRUITS are round with a tiny beak. FLOATING LEAVES are narrow-oval, up to 10cm long, sometimes tinged red, and lack a flexible joint. SUBMERGED LEAVES are narrow. STATUS-Locally common.