Crassula helmsii

TaxID: 300471

Basic Information

Crassula helmsii

Australian swamp stonecrop, New Zealand Pigmyweed

Crassula helmsii, known as swamp stonecrop or New Zealand pigmyweed, is an aquatic or semiterrestrial species of succulent plant in the family Crassulaceae. 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. It is on the Global Biodiversity Information Facility's Global Register of Introduced and Invasive Species of eleven countries.

from Wikipedia

Taxonomic Information

Eukaryota

Streptophyta

Magnoliopsida

Saxifragales

Crassulaceae

Crassula

helmsii

Unclassified

Photos (5 photos)

Crassula helmsii
c
(c) Jenny Emeny@BY-NC
Crassula helmsii
c
(c) unknown@CC0
Crassula helmsii
c
(c) A Emmerson@BY-NC
Crassula helmsii
c
(c) François Kuborn@BY-NC
Crassula helmsii
c
(c) Jael Palhas@BY-NC

Morphological Features

No morphological description available.

Host Plants (0 host plants)

Data sources: EPPO Global Database and relevant literature.

No host plants available.

Quarantine Status (32 records)

Data sources: IPPC website and national quarantine websites; verified by human review.

Country Status Year Added
Austria IAS of Union concern 2025
Belgium IAS of Union concern 2025
Bulgaria IAS of Union concern 2025
Switzerland Regulated Invasive Alien Plant 2008
Cyprus IAS of Union concern 2025
Czechia IAS of Union concern 2025
Germany IAS of Union concern 2025
Denmark IAS of Union concern 2025
EPPO A2 Present —
Spain IAS of Union concern 2025
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Distribution (21 countries)

Data Sources: EPPO Global Database and GBIF.

19
Present
2
Absent
0
Unknown/Other
Country Status State
Australia Present
Austria Present —
Belgium Present —
Switzerland Present —
Germany Present —
Denmark Present —
Spain Present —
France Present —
United Kingdom Present
Hungary Present —
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Distribution Map (Latitude and longitude coordinates sourced from GBIF.)

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Genomes (0 records)

Data source: NCBI.

No genome records available.

Transcriptomes (0 records)

Data source: NCBI.

No transcriptome records available.

DNA Barcodes (10 records)

View all

Data source: BOLD.

Process ID BIN Marker Length Country Date Lat/Lon Sequence
NLFLM4304-16 - ITS 843 Netherlands 2013-08-13 52.665, 6.424
NLFLM3928-16 - ITS 842 Netherlands 2013-06-07 51.662, 5.236
NLFLM3619-16 - ITS 843 Netherlands 2013-06-29 51.51, 4.63
GBVX5687-15 - rbcL 1218 - - -
GBVX5658-15 - rbcL 687 - - -
GBITS60488-21 - ITS 796 New Zealand - -
EDTOL683-21 - rbcL 607 United Kingdom 2021-09-10 55.938, -3.153
EBGEP054-24 - rbcL 578 United Kingdom 1988-11-11 55.938396, -3.1477761
EBGEP053-24 - rbcL 578 United Kingdom 1962-09-27 51.242035, -0.8277629999999999
EBGEP052-24 - rbcL 578 United Kingdom 1997-10-10 55.057854, -4.056714

Literature