Australian swamp stonecrop
Crassula helmsii (Kirk) Cockayne
Crassula helmsii, known as Australian swamp stonecrop, is an aquatic or semiterrestrial succulent in the Crassulaceae family. Native to Australia and New Zealand, it has been introduced to various regions, including parts of Europe and the UK. The species was banned from sale in the UK in 2014 due to its invasive nature. It is listed as an invasive species in the Global Biodiversity Information Facility's register for eleven countries.
Description
Crassula helmsii is a member of the Crassulaceae family and is known for its aquatic or semiterrestrial growth habit. It was first described in 1907 and has since spread beyond its native range in Australia and New Zealand to regions such as the UK, Belgium, France, the Netherlands, and others. Its invasive potential has led to regulatory actions, including a ban on its sale in the UK to prevent further ecological impact. The plant is recognized as a problematic invasive species in multiple countries.
Other common names
New zealand pigmyweedAustralian swamp stonecropswamp-stonecropswamp crassulaNew Zealand Pygmyweed
Distribution
Australasian · Belgium · Flemish Region · Walloon Region · France · The Netherlands · Great Britain · Channel Is. · Germany · Ireland · Ireland | Atlantic Ocean · Northern Ireland · Italy · Netherlands · Portugal · Spain · England · Scotland · Wales · SE · ES · NO · DK · Brussels-Capital Region · New South Wales · New Zealand South · South Australia · Tasmania · Tunisia · Victoria
Synonyms
Tillaea helmsiiTillaea recurvaBulliarda recurvaCrassula recurvaCrassula helmsii