Ranunculus trichophyllus
Ecology
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).
Status
Trends
The aquatic Ranunculus species are difficult to identify, and this early-flowering plant is easily overlooked. Under-recording rather than decline may therefore be the reason for the concentration of pre-1970 records in some areas as there is little evidence of decline in neighbouring counties.
World Distribution
Circumpolar Wide-boreal element.
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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
Woodiness
Clonality - primary
Clonality - secondary
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)
.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1989)
.
1997. Aquatic plants in Britain and Ireland.