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)

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%)


JNCC Designations


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.