Ranunculus trichophyllus

Tracheophyta MagnoliopsidaRanunculaceaeRanunculusRanunculus trichophyllus


A small annual or perennial which grows in shallow, still or very slowly flowing water. It is most frequent in ponds, dune-slacks and drainage ditches, but it is also found in larger sites if they are sheltered. It tolerates a range of water chemistry but is most frequent in mesotrophic or eutrophic water. 0-310 m (Alston Moor, Cumberland).



World Distribution

Circumpolar Wide-boreal element.

Broad Habitats

Light (Ellenberg): 7

Moisture (Ellenberg): 12

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 6


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.7

July Mean Temperature (Celsius): 15.2

Annual Precipitation (mm): 861

Length: 60

Perennation - primary


Life Form - primary

Annual hydrophyte (aquatic therophyte)



Clonality - primary

Little or no vegetative spread

Clonality - secondary

Irregularly fragmenting (mainly water plants)

Distribution information

Count of 10km squares in Great Britain: 1121

Count of 10km squares in Ireland: 259

Count of 10km squares in the Channel Isles: 6

Atlas Change Index: -0.07

Weighted Changed Factor: -14

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

Atlas (24a)
Hultén E, Fries M
1986.  Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1989)
Preston CD, Croft JM
1997.  Aquatic plants in Britain and Ireland.