Curly Waterweed - Lagarosiphon major

Alternative names
Curly Water-thyme

Submerged aquatic plant with elongated stems forming entangled masses. Leaves linear, alternate, spreading and recurved, crowded towards the shoot tips, minutely toothed. Flowers pinkish, 3 to 4 mm.

Identification difficulty

Lakes and canals.

When to see it

Flowers July and August.

Life History


UK Status

Widespread in the southern half of Britain.

VC55 Status

First recorded in Leicestershire and Rutland in 1999 and now spreading. It was not recorded in the 1979 Flora survey of Leicestershire.

be our species champion

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map