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).
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.
European Temperate element; also in N. America.
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