Ranunculus fluitans
Ecology
This is a perennial species which grows in large, rapidly flowing rivers with a stable substrate. It is usually found in base-rich and meso-eutrophic water. In Ireland, it is confined to a single, now locally highly polluted, river. Lowland.
Status
Trends
This is not a well-understood species; in some areas of Britain it may be under-recorded whereas in others it may be reported in error for other taxa. Historically R. penicillatus subsp. pseudofluitans may have been recorded as R. fluitans, whereas now hybrids with R. fluitans as one parent are more likely to be reported as the species.
World Distribution
European Temperate element.
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Broad Habitats
Light (Ellenberg): 7
Moisture (Ellenberg): 12
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 6
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.3
July Mean Temperature (Celsius): 15.4
Annual Precipitation (mm): 798
Length: 300
Perennation - primary
Life Form - primary
Woodiness
Clonality - primary
Clonality - secondary
Count of 10km squares in Great Britain: 373
Count of 10km squares in Ireland: 3
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: 1.96
JNCC Designations
Atlas text references
Atlas (23c)
.
1988. The Irish Red Data Book. 1. Vascular Plants.
.
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.