Hydrocotyle vulgaris

Tracheophyta MagnoliopsidaApiaceaeHydrocotyleHydrocotyle vulgaris


A mat-forming perennial herb found in a wide range of damp or wet habitats, including carr, mires, fens, fen-meadows, swamps, marshes, in soakways and along spring-lines, and in dune-slacks and wet hollows in stabilised shingle. In very oceanic areas it grows in drier habitats, such as turfed wall-tops. 0-530 m (Tal-y-Fan, Caerns.).



World Distribution

Suboceanic Southern-temperate element.

© P. Shannon

Broad Habitats

Fen, marsh and swamp (not wooded)

Light (Ellenberg): 8

Moisture (Ellenberg): 8

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 3


Salt Tolerance (Ellenberg): 1

January Mean Temperature (Celsius): 3.7

July Mean Temperature (Celsius): 14.4

Annual Precipitation (mm): 1126

Life form information

Height (cm): 20

Perennation - primary


Life Form - primary




Clonality - primary

Extensively creeping and rooting at nodes

Distribution information

Count of 10km squares in Great Britain: 2091

Count of 10km squares in Ireland: 842

Count of 10km squares in the Channel Isles: 10

Atlas Change Index: -0.53

Weighted Changed Factor: -25

Weighted Change Factor Confidence (90%)


Distribution information

JNCC Designations


PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.

Atlas text references