A low shrub of muddy or sandy saltmarshes, commonly fringing intertidal pools and creeks, and often forming extensive stands on ungrazed saltings. In W. Britain and Ireland it also occurs locally on coastal rocks and cliffs. Lowland.
This species markedly extended its range northwards in the British Isles during the 20th century, as shown by its spread in N. Ireland (Leach, 1989) and its recent resurgence on the Isle of Man (Allen, 1984). This has been paralleled by similar changes elsewhere in N. Europe, for example, in Sweden (Blomgren, 1992).
Light (Ellenberg): 9
Moisture (Ellenberg): 8
Reaction (Ellenberg): 8
Nitrogen (Ellenberg): 6
Salt Tolerance (Ellenberg): 6
January Mean Temperature (Celsius): 4.6
July Mean Temperature (Celsius): 15.7
Annual Precipitation (mm): 869
Height (cm): 80
Perennation - primary
Life Form - primary
Comment on Life Form
Clonality - primary
Count of 10km squares in Great Britain: 322
Count of 10km squares in Ireland: 68
Count of 10km squares in the Channel Isles: 10
Atlas Change Index: 0.06
Weighted Changed Factor: -1
Weighted Change Factor Confidence (90%)
Atlas text references
1984. Halimione portulacoides (L.) Aellen on coastal rocks and cliffs. Watsonia. 15:95-103.
1950. Biological Flora of the British Isles. No. 29. Halimione portulacoides (L.) Aell. Journal of Ecology. 38:214-222.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1980)
1965. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.