Coiled Pondweed
(Spiral Ditchgrass, Ditch Grass), Spiral Tasselweed)
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Ruppia spiralis
(Ruppia rostellata, Ruppia brachypus, Rupia cirrhosa)
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July-September. Often flowers later than Tassel Pondweed
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It is a perennial aquatic which occurs in similar habitats to Ruppia maritima, including coastal lakes, tidal inlets, creeks and brackish ditches. It usually grows in deeper water than Ruppia maritima and tolerates more saline conditions, even growing with Zostera species. Lowland. It is less frequent than Tassel Pondweed in brackish pools and ditches.
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Tassel Pondweed
(Beaked Tasselweed)
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Ruppia maritima
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July-September
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A submerged, annual or perennial aquatic of brackish waters, it grows in shallow water in coastal lakes, pools on saltmarshes, rock pools, creeks and ditches near the sea. It is also found as a dwarf variant on tidal mud-flats, especially in North-East Scotland. The recent inland record in Cheshire is in an area of natural salt deposits. Lowland.
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