Thalictrum alpinum
Ecology
A small, rhizomatous perennial of mountain habitats. It is found on damp rock ledges, at the open edges of stony streams and flushes and in thin grassland. It is a good indicator of substrates which are at least slightly base-rich. From sea level in N. Scotland, but generally above 300 m and reaching 1190 m on Ben Lawers (Mid Perth).
Status
Trends
In Britain the distribution of T. alpinum is stable; in Ireland it has not been recorded recently at sites in Co. Antrim and Co. Down, despite searching, and further fieldwork is required to establish its current status elsewhere.
World Distribution
Circumpolar Arctic-montane element, with a disjunct distribution.
Broad Habitats
Light (Ellenberg): 8
Moisture (Ellenberg): 7
Reaction (Ellenberg): 6
Nitrogen (Ellenberg): 3
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 2
July Mean Temperature (Celsius): 12.1
Annual Precipitation (mm): 1845
Height (cm): 15
Perennation - primary
Life Form - primary
Woodiness
Clonality - primary
Count of 10km squares in Great Britain: 409
Count of 10km squares in Ireland: 23
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: -0.34
Weighted Changed Factor: 10
Weighted Change Factor Confidence (90%)
JNCC Designations
Atlas text references
Atlas (26a)
.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1989)
.
1965. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.