New Zealand Pigmyweed (Crassula helmsii) - Detail

Species Detail - New Zealand Pigmyweed (Crassula helmsii) - Species information displayed is based on the dataset "BSBI tetrad data for Ireland".

Terrestrial Map - 10km

Distribution of the number of records recorded within each 10km grid square (ITM).

Live Map

Marine Map - 50km

Distribution of the number of records recorded within each 50km grid square (WGS84).

Live Map

Species image

Scientific Name Crassula helmsii

Common Name New Zealand Pigmyweed

Taxon Version Key NBNSYS0000004639 RecommendedWell-formed

Synonyms Crassula recurva non N.E. Br. (Hook.f.) Ostenf., New Zealand Pygmyweed , Tillaea helmsii Kirk, Tillaea recurva (Hook.f.) Hook.f., Tillaea recurva (Hook. f.) Hook. f.

Designations Invasive Species: EU Invasive Alien Species Regulation No. 1143/2014 || Invasive Species: Regulation S.I. 477/2011 (Ireland) || Invasive Species: Detailed Risk Assesment || Invasive Species: High Risk Invasive Species (2013 Report) || Invasive Species: Regulation S.I. 374/2024 (Ireland) || Invasive Species: Detailed Risk Assesment >> High Risk

Abbreviation crhel

Authority (Kirk) Cockayne

Group Flowering plant

Rank Species

Number Of Records 9

Number Of 10Km Squares 8

Number Of 50Km Squares 7

Oldest Record 01/01/1970

Newest Record 31/12/2010

Phenology - earliest record (across all datasets) 1 January (recorded in 2008)

Phenology - latest record (across all datasets) 21 October (recorded in 2009)

Species Profiles

Citation Botanical Society of the British Isles, BSBI tetrad data for Ireland, National Biodiversity Data Centre, Ireland, New Zealand Pigmyweed (Crassula helmsii), accessed 26 August 2025, <https://maps.biodiversityireland.ie/Dataset/9/Species/29777>

Species Detail - New Zealand Pigmyweed (Crassula helmsii) - Species information displayed is based on the dataset "BSBI tetrad data for Ireland".

Terrestrial Map - 10km

Marine Map - 50km

Species image

Records per month (across all datasets)

Records per year (across all datasets)