Achillea ptarmica
Tracheophyta
›Magnoliopsida›Asteraceae›Achillea›Achillea ptarmica
Ecology
A perennial herb of damp or wet habitats on a wide range of soils, including fen- and water-meadows, rush-pasture, marshes, streamsides, wet heath, springs and flushes on hill slopes and occasionally in wet woodland. It is also established from cultivation in churchyards, and on roadsides and waste ground. 0-770 m (Cross Fell, Cumberland).
Status
Native
Trends
A. ptarmica was mapped as `all records` in the 1962 Atlas. It is now better recorded in some areas, but has declined in others. Analysis of the database reveals that while many losses occurred before 1950, they have accelerated since then; most are due to drainage and habitat destruction.
World Distribution
Eurasian Boreo-temperate element; widely naturalised outside its native range.
© S. Hammonds
Notts
© S. Hammonds
Broad Habitats
Fen, marsh and swamp (not wooded)
Light (Ellenberg): 7
Moisture (Ellenberg): 7
Reaction (Ellenberg): 5
Nitrogen (Ellenberg): 3
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.3
July Mean Temperature (Celsius): 14.3
Annual Precipitation (mm): 1146
Height (cm): 60
Perennation - primary
Perennial
Life Form - primary
Hemicryptophyte
Woodiness
Herbaceous
Clonality - primary
Rhizome shortly creeping
Count of 10km squares in Great Britain: 2382
Count of 10km squares in Ireland: 492
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: -0.65
Weighted Changed Factor: -11
Weighted Change Factor Confidence (90%)
17
JNCC Designations
NBNSYS0000004453
Comment on Clonality