Duck potato Sagittaria latifolia
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An invasive, non-native plant.
This aquatic plant with heart shaped leaves and 3-petalled white flowers is widely available from garden centres. It is found mostly in southern England, where it was first recorded in 1941, but seems to be spreading, with new recent discoveries in the midlands and northern England.
What's the problem?
It produces tubers, stolons and seed, all of which help it to spread when it escapes into in the wild. It usually appears in shallow water where it’s been planted originally, and has been seen growing in lakes, ponds, canals, ditches, streams and rivers, competing with similar native plants like water-plantain.
Rapid Risk Assessment
***** Critical Risk
This species is listed on Schedule 9 of the Wildlife and Countryside Act in England and Wales therefore, it is also an offence to plant or otherwise cause to grow these species in the wild.
The image (right) is taken from Wikimedia Commons.