In Britain and Ireland, H. verticillata grows in relatively deep water in mesotrophic lakes, only occasionally extending into the shallows. The Irish population is known to be female, but flowers have never been seen in Britain. Reproduction is by turions. Lowland.
Although this species was first discovered in Britain at Esthwaite Water (Westmorland) in 1914 it has not been seen at this site since 1941, and may have been eliminated by eutrophication. It survives at Lough Rusheenduff (W. Galway), where it was discovered in 1935, and it was found in Kirkcudbrightshire in 1999.
Eurasian Southern-temperate element, with a continental distribution in W. Europe; widely naturalised outside its native range.
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