A perennial herb of seasonal or permanently wetland habitats, including wet meadows, marshes, fens, ditches, ponds and lakesides. It grows on a wide range of soil types, but has a preference for non-calcareous substrates. 0-825 m (Cross Fell, Cumberland).
Despite widespread destruction of wetlands, there is no evidence to suggest a change in the distribution of this species since the 1962 Atlas, perhaps due to its ability to colonise new standing water habitats. Two subspecies (subsp. palustre and subsp. elongatum) occur in our area throughout the range of the species, but have not been recorded evenly.
Eurosiberian Boreo-temperate element; also in N. America.
There are no images in this gallery.
Light (Ellenberg): 7
Moisture (Ellenberg): 9
Reaction (Ellenberg): 5
Nitrogen (Ellenberg): 4
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.5
July Mean Temperature (Celsius): 14.5
Annual Precipitation (mm): 1105
Height (cm): 75
Perennation - primary
Life Form - primary
Clonality - primary
Count of 10km squares in Great Britain: 2652
Count of 10km squares in Ireland: 932
Count of 10km squares in the Channel Isles: 9
Atlas Change Index: 0.07
Weighted Changed Factor: 5
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.
1992. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 3. 2 vols.
1994. Floristic change in English grazing marshes: the impact of 150 years of drainage and land-use change. Watsonia. 20:3-24.