Curly Waterweed (Lagarosiphon major) - Detail

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

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 Lagarosiphon major

Common Name Curly Waterweed

Taxon Version Key NHMSYS0000460065 UnverifiedUnverified

Synonyms Elodea crispa hort., Elodea crispa nom. nud. hort., Lagarosiphon muscoides var. major Ridl.

Designations Invasive Species: Invasive Species || Invasive Species: Invasive Species >> High Impact Invasive Species || Invasive Species: Invasive Species >> EU Regulation No. 1143/2014 || Invasive Species: Invasive Species >> Regulation S.I. 477 (Ireland)

Abbreviation lamaj

Authority (Ridl.) Moss ex V.A. Wager

Group flowering plant

Rank Species

Number Of Records 29

Number Of 10Km Squares 7

Number Of 50Km Squares 3

Oldest Record 13/08/2007

Newest Record 12/07/2017

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

Phenology - latest record (across all datasets) 22 October (recorded in 2006)

Species Profiles

Citation Environmental Protection Agency, Water Framework Directive Lake Macrophyte Status Survey Data 2007 to 2019, National Biodiversity Data Centre, Ireland, Curly Waterweed (Lagarosiphon major), accessed 21 April 2025, <https://maps.biodiversityireland.ie/Dataset/365/Species/42755>

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

Marine Map - 50km

Species image

Records per month (across all datasets)

Records per year (across all datasets)