Oenanthe crocata

Tracheophyta MagnoliopsidaUmbelliferaeOenantheOenanthe crocata


A tuberous perennial herb of shallow water in ditches, the banks of streams, rivers, canals, lakes and ponds, roadside culverts, marshes and wet woodland, among boulders at the top of beaches and on dripping or flushed sea-cliffs. Reproduction is usually by seed, and it perhaps spreads when detached tuberous roots are washed downstream. Generally lowland, but reaching 320 m in The Paps (N. Kerry).



World Distribution

Suboceanic Southern-temperate element.

© K.J. Walker, BSBI

Broad Habitats

Light (Ellenberg): 7

Moisture (Ellenberg): 9

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 7


Salt Tolerance (Ellenberg): 1

January Mean Temperature (Celsius): 4

July Mean Temperature (Celsius): 14.8

Annual Precipitation (mm): 1124

Life form information

Height (cm): 150

Perennation - primary


Life Form - primary


Life Form - secondary

Perennial hydrophyte (perennial water plant)



Clonality - primary

Little or no vegetative spread

Distribution information

Count of 10km squares in Great Britain: 1599

Count of 10km squares in Ireland: 633

Count of 10km squares in the Channel Isles: 12

Atlas Change Index: -0.04

Weighted Changed Factor: 0

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