An erect to procumbent annual occurring in the upper parts of silty estuarine saltmarshes, usually in tall, ungrazed vegetation (including stands of Juncus maritimus and Phragmites australis) inundated by brackish water during high spring tides. Lowland.
A. longipes was only confirmed as a British species in 1977, although it was first reported in 1957. It is almost certainly still under-recorded.
European Boreal-montane element.
Light (Ellenberg): 9
Moisture (Ellenberg): 6
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 8
Salt Tolerance (Ellenberg): 4
January Mean Temperature (Celsius): 4.2
July Mean Temperature (Celsius): 15.6
Annual Precipitation (mm): 982
Count of 10km squares in Great Britain: 39
Count of 10km squares in Ireland: 0
Count of 10km squares in the Channel Isles: 0
Scarce Atlas Account
Atriplex longipes Drejer
This species is usually found in tall, estuarine saltmarsh vegetation, especially in silty, brackish sites. Associated species include a perennial variant of Aster tripolium, Cochlearia anglica, Juncus maritimus and Phragmites australis.
A. longipes is an annual that is capable of self-pollination but also exhibits protogyny, which promotes outcrossing (Taschereau 1985). The flowers, to a large extent wind-pollinated, are produced during July and August.
A. longipes was not widely recognised as a British plant until its presence here was confirmed by Taschereau (1977). It is almost certainly under-recorded. It hybridises extensively with A. glabriuscula and A. prostrata, making identification difficult.
A. longipes sensu stricto is endemic to Europe, occurring on the coasts of southern Scandinavia and the Baltic (Jalas & Suominen 1980). Scandinavian botanists usually treat the closely related A. praecox (q.v.) as a subspecies of A. longipes.
J. R. Akeroyd
PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.