This rhizomatous perennial was formerly known from the margin of a coastal lake in Jersey, and from a wet, coastal dune-slack near Ainsdale (S. Lancs.). Lowland.
or alien. S. pungens was first recorded in our area in 1724. It declined in Jersey, where it is possibly native, during the 1940s and 1950s; it was last seen there in the early 1970s, apparently having been replaced by Carex riparia. It was first collected at Ainsdale in 1909, and in 1928 a large patch occurred in a dune-slack. Its origin there is obscure and it became extinct by 1978. Ainsdale stock survived in cultivation, however, and has been planted at several sites nearby.
European Temperate element; widespread in N. America.
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