An evergreen perennial of open, damp, often clay-rich soils in shaded woodland and hedges, especially the sides of streams, and damp grassland and path-sides. It can spread rapidly from stem fragments. Seed set is rare, and some clones may be sterile. 0-365 m (S. of Buxton, Derbys.).
L. nummularia is probably native in many southern sites, but is usually alien in the north. The limits of its native range are uncertain due to garden escapes, which can be well-naturalised. It was mapped as `all records` in the 1962 Atlas; analysis of the database reveals that most losses have occurred since 1950.
European Temperate element; widely naturalised outside its native range.
Light (Ellenberg): 5
Moisture (Ellenberg): 7
Reaction (Ellenberg): 5
Nitrogen (Ellenberg): 5
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.7
July Mean Temperature (Celsius): 15.5
Annual Precipitation (mm): 895
Height (cm): 5
Perennation - primary
Life Form - primary
Life Form - secondary
Comment on Life Form
Clonality - primary
Count of 10km squares in Great Britain: 1266
Count of 10km squares in Ireland: 227
Count of 10km squares in the Channel Isles: 3
Atlas Change Index: -0.02
Weighted Changed Factor: 25
Weighted Change Factor Confidence (90%)
Atlas text references
1988. Cytogenetical and geographical aspects of sterility in Lysimachia nummularia. Nordic Journal of Botany. 8:325-328.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
1978. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 2. 2 vols.
1983. Floral biology and floral rewards of Lysimachia (Primulaceae). American Midland Naturalist. 110:249-256.