A perennial herb of various wet habitats, usually neutral to base-rich rather than very acidic, including Alnus carr, the edges of rivers, streams, canals, lakes and ponds, ditches and winter-wet meadows and pastures. A small form, var. radicans, is found in mountain flushes and lake shores in N. & W. Britain and Ireland. 0-1100 m (Braeriach and Lochnagar, S. Aberdeen).
There is little evidence of any change in the 10-km square distribution of this species.
Circumpolar Wide-boreal element.
Light (Ellenberg): 7
Moisture (Ellenberg): 9
Reaction (Ellenberg): 6
Nitrogen (Ellenberg): 4
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.4
July Mean Temperature (Celsius): 14.4
Annual Precipitation (mm): 1111
Height (cm): 40
Perennation - primary
Life Form - primary
Clonality - primary
Clonality - secondary
Comment on Clonality
Count of 10km squares in Great Britain: 2636
Count of 10km squares in Ireland: 802
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: -0.26
Weighted Changed Factor: -36
Weighted Change Factor Confidence (90%)
Atlas text references
1988. Comparative Plant Ecology.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1989)
1965. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.
1973. A revisin of Caltha (Ranunculaceae). Blumea. 21:119-150.