An annual, or rarely biennial, herb of banks and bare waste land near the sea, and of salted road verges. It is also frequent as a casual of roadsides, rubbish tips, gardens and waste places. Lowland.
L. ruderale is increasingly found as a halophyte along trunk roads, but is apparently less frequent as a casual than it was before the Second World War.
As an archaeophyte L. ruderale has a Eurosiberian Temperate distribution; it is widely naturalised outside this range.
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Light (Ellenberg): 9
Moisture (Ellenberg): 4
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 7
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.9
July Mean Temperature (Celsius): 16
Annual Precipitation (mm): 757
Height (cm): 40
Perennation - primary
Life Form - primary
Clonality - primary
Count of 10km squares in Great Britain: 545
Count of 10km squares in Ireland: 7
Count of 10km squares in the Channel Isles: 4
Atlas Change Index: -0.04
Atlas text references
1994. 'Maritime' plants of roads in Cambridgeshire (v.c. 29). Nature in Cambridgeshire. 36:37-60.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1996)
1965. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.
1991. Crucifers of Great Britain and Ireland. Botanical Society of the British Isles Handbook no. 6.