| Summary: | In September 2001 Stuckenia (Potamogeton) filiformis was discovered in 8 dune lakes on the Isle of Texel, the Netherlands. Six of these dune pools were the result of recent turf-stripping operations in wet dune slacks, but in the two remaining dune lakes the plant most probably has been overlooked for many years. S. filiformis usually grows in an open vegetation with helophytes like Eleocharis palustris and stoneworts, notably Chara aspera, the latter being typical of sandy, shallow and wind-exposed shores of dune-lakes.\nThe author follows the recent subdivision of Potamogeton s.l. in three genera, viz. Potamogeton, Stuckenia and Groenlandia.
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