The Wildlife and Countryside Act 1981 (Prohibition on Sale etc. of Invasive Non-native Plants) (England) Order 2014 No. 538

Non-native species prescribed for the purposes of section 14ZA of the Wildlife and Countryside Act 1981

3.  The prescribed descriptions of plant are—

Common name	Scientific name
Fern, Water	Azolla filiculoides
Parrot’s Feather	Myriophyllum aquaticum
Pennywort, Floating	Hydrocotyle ranunculoides
Primrose, Floating Water	Ludwigia peploides
Primrose, Water	Ludwigia grandiflora
Primrose, Water	Ludwigia uruguayensis
Stonecrop, Australian Swamp (otherwise known as New Zealand Pygmyweed)	Crassula helmsii