Circaea lutetiana
Tracheophyta
›Magnoliopsida›Onagraceae›Circaea›Circaea lutetiana
Ecology
A perennial herb found in moist, usually base-rich, shaded habitats, including both ancient and secondary woodland, hedgerows, scrub, stream and river banks, and as a weed of cultivation. Its spread is aided by its long, brittle but very persistent rhizomes. Generally lowland, but reaching 465 m at Highfolds Scar (Mid-W. Yorks.).
Status
Native
Trends
There has been no appreciable change in the overall range of this species since the 1962 Atlas.
World Distribution
European Temperate element; also in C. and E. Asia and N. America.
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Broad Habitats
Broadleaved, mixed and yew woodland
Light (Ellenberg): 4
Moisture (Ellenberg): 6
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 6
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.7
July Mean Temperature (Celsius): 14.9
Annual Precipitation (mm): 1041
Height (cm): 60
Perennation - primary
Perennial
Life Form - primary
Non-bulbous geophyte (rhizome, corm or tuber)
Woodiness
Herbaceous
Clonality - primary
Rhizome far-creeping
Count of 10km squares in Great Britain: 2053
Count of 10km squares in Ireland: 748
Count of 10km squares in the Channel Isles: 8
Atlas Change Index: -0.38
Weighted Changed Factor: 0
Weighted Change Factor Confidence (90%)
15
JNCC Designations
NBNSYS0000003604