Hydrocotyle ranunculoides
 Hydrocotyle ranunculoides known commonly as water pennywort or floating pennywort is an aquatic plant in the family Apiaceae. It is native to North and South America and parts of Africa. In the United Kingdom it is an invasive alien species which is currently spreading in waterways. It is one of five aquatic plants which are to be banned from sale in the UK from April 2014. This is the first ban of its kind in the country. It is also a weed in Australia.