A stoloniferous perennial herb which grows in fens and marshes, on ditch, canal and pond edges, around reservoirs and in flooded gravel-pits and quarries. It is normally found in base-rich, still or slowly flowing water. Lowland.
The 1962 Atlas illustrated the decline of native R. lingua in Britain, a result of drainage over the last two hundred years. Since 1962, however, the situation has been transformed by its increased popularity as an ornamental plant. It is frequently introduced to ponds and other wetlands in the wild and the distinction between native and alien populations is now hopelessly blurred. In Ireland the native plant is still locally frequent.
Eurosiberian Temperate element.
Light (Ellenberg): 7
Moisture (Ellenberg): 10
Reaction (Ellenberg): 6
Nitrogen (Ellenberg): 7
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.7
July Mean Temperature (Celsius): 15.2
Annual Precipitation (mm): 868
Height (cm): 120
Perennation - primary
Life Form - primary
Life Form - secondary
Clonality - primary
Count of 10km squares in Great Britain: 537
Count of 10km squares in Ireland: 210
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: 1.7
Weighted Changed Factor: 18
Weighted Change Factor Confidence (90%)
Atlas text references
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.