Juncus squarrosus
Ecology
A wiry, tufted perennial herb which is characteristic of wet peaty heath and moorland, raised and valley mires and upland flushes on acidic substrates. 0-1040 m (Carrantuohill, S. Kerry).
Status
Trends
J. squarrosus has been lost from many sites in S. and E. England since the 1962 Atlas, due to drainage and agricultural improvement. The distribution is stable elsewhere.
World Distribution
Suboceanic Temperate element; also in Greenland.
Broad Habitats
Light (Ellenberg): 7
Moisture (Ellenberg): 7
Reaction (Ellenberg): 2
Nitrogen (Ellenberg): 2
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.1
July Mean Temperature (Celsius): 13.8
Annual Precipitation (mm): 1254
Height (cm): 30
Perennation - primary
Life Form - primary
Woodiness
Clonality - primary
Count of 10km squares in Great Britain: 1849
Count of 10km squares in Ireland: 484
Count of 10km squares in the Channel Isles: 0
Weighted Changed Factor: -3
Weighted Change Factor Confidence (90%)
JNCC Designations
Atlas text references
Atlas (317c)
.
1962. La flore atlantique européenne. Documents pour les cartes des productions végétales serie Europe-Atlantique, vol. 1.
.
1988. Comparative Plant Ecology.
.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
.
1965. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.
.
1966. Biological Flora of the British Isles. No. 101. Juncus squarrosus L. Journal of Ecology. 54:535-548.