CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora) is an international agreement that came into force in 1975. The import, export and use for commercial gain of certain species requires a CITES permit. For plants, the list includes mainly orchid, cacti and cycads.
Guidance on CITES import & exports (UK government)
List of species covered by CITES
The Nagoya Protocol is an agreement part of the CBD (Conventional on Biological Diversity) which deals with the fair and equitable sharing of benefits arising from the utilisation of genetic resources. The Protocol entered into force on 12 October 2014, and was ratified by the UK in February 2016.