Species Detail - Curly Waterweed (Lagarosiphon major) - Species information displayed is based on the dataset "Water Framework Directive Lake Macrophyte Status Survey Data 2007 to 2019".
Terrestrial Map - 10km
Terrestrial Map - 10km
Distribution of the number of records recorded within each 10km grid square (ITM).Marine Map - 50km
Marine Map - 50km
Distribution of the number of records recorded within each 50km grid square (WGS84)._0.jpg)
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Lagarosiphon major
Curly Waterweed
NHMSYS0000460065
RecommendedWell-formed
Elodea crispa hort., Elodea crispa nom. nud. hort., Lagarosiphon major (Ridley) Moss, Lagarosiphon muscoides var. major Ridl.
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
lamaj
(Ridl.) Moss ex V.A. Wager
Flowering plant
Species
29
7
3
13/08/2007
12/07/2017
1 January (recorded in 2008)
22 October (recorded in 2006)
Environmental Protection Agency, Water Framework Directive Lake Macrophyte Status Survey Data 2007 to 2019, National Biodiversity Data Centre, Ireland, Curly Waterweed (Lagarosiphon major), accessed 31 August 2025, <https://maps.biodiversityireland.ie/Dataset/365/Species/42755>