Juncus acutiflorus
Tracheophyta
›Magnoliopsida›Juncaceae›Juncus›Juncus acutiflorus
Ecology
This species is usually tall and erect, and more extensively rhizomatous than J. articulatus. It occurs in wet or damp habitats on acidic soils, frequently at a lower pH than is tolerated by J. articulatus, particularly in damp meadows and pastures, marshes, bogs, wet heathland, and by ditches and ponds. 0?685 m (Mangerton, S. Kerry).
Status
Native
Trends
J. acutiflorus was under-recorded in the 1962 Atlas. It often closely resembles the more robust growth-forms of J. articulatus and this might have produced some inaccuracies in the records of both species. However, they are both so frequent that this would be unlikely to affect the distributions shown on the maps.
World Distribution
European Temperate element; also in N. America.
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Broad Habitats
Fen, marsh and swamp (not wooded)
Light (Ellenberg): 8
Moisture (Ellenberg): 8
Reaction (Ellenberg): 4
Nitrogen (Ellenberg): 2
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.5
July Mean Temperature (Celsius): 14.5
Annual Precipitation (mm): 1115
Height (cm): 100
Perennation - primary
Perennial
Life Form - primary
Hemicryptophyte
Woodiness
Herbaceous
Clonality - primary
Rhizome far-creeping
Count of 10km squares in Great Britain: 2498
Count of 10km squares in Ireland: 845
Count of 10km squares in the Channel Isles: 11
Atlas Change Index: 1.16
Weighted Changed Factor: 27
Weighted Change Factor Confidence (90%)
20
JNCC Designations
NBNSYS0000002230