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Floating Pennywort Floating Pennywort is an invasive nonnative plant which is smothering plants and aquatic life in our rivers and streams. Members of British Canoeing have been organising several days on the River Wey and Mole (both of which join the River Thames) to help combat this plant. I visited them recently near the River Mole and witnessed first hand the amount of Floating Pennywort they are able to remove in a few hours. Once the plant has been lifted onto the riverbank it is allowed to decompose naturally and any insects etc. can make their way back to the water.
