| Swamp stonecrop | |
|---|---|
| |
| Leaves and flowers of C. helmsii | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Saxifragales |
| Family: | Crassulaceae |
| Genus: | Crassula |
| Species: | C. helmsii
|
| Binomial name | |
| Crassula helmsii | |
| Synonyms | |
| |
Crassula helmsii, known as swamp stonecrop or New Zealand pigmyweed,[1] is an aquatic or semiterrestrial species of succulent plant in the family Crassulaceae.[2] Originally found in Australia and New Zealand, it has been introduced around the world. In the United Kingdom, this plant is one of five introduced invasive aquatic plants that were banned from sale from April 2014, the first ban of its kind in the country.[3] It is on the Global Biodiversity Information Facility's Global Register of Introduced and Invasive Species of eleven countries.[4]
- ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
- ^ "Crassula helmsii (aquatic plant, succulent)". Global Invasive Species Database. ISSG. April 15, 2010. Archived from the original on May 9, 2012. Retrieved March 8, 2012.
- ^ "UK bans sale of five invasive non-native aquatic plants". BBC News. 29 January 2013.
- ^ "Crassula helmsii A.Berger". www.gbif.org. Retrieved 2020-04-04.