Verrucaria aquatilis


The thallus of this aquatic lichen is grey-brown to dark green and forms a thin and smooth crust. Many black warts (perithecia) are scattered over the surface.

Identification difficulty

A lichen of freshwater habitats where it can be found submerged and normally on siliceous (acid) rocks.

When to see it

All year round

Life History

An early coloniser of suitable areas.

UK Status

Widespread, but with records suggesting a mainly northerly and westerly distribution in Britain. It is the most common of the freshwater Verrucaria species.

VC55 Status

Occasional in Leicestershire and Rutland.

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Leicestershire & Rutland Map


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

UK Map