Physcia caesia


    A small, foliose species, typically 1 to 2 cm in diameter, with narrow, convex lobes lacking marginal cilia, lobe surfaces pale grey with distinct white flecks.

    Similar Species

    It is commonly confused with Phaeophyscia orbicularis as they are found in similar situations, but Phaeophyscia has a darker grey thallus and has smooth lobes without any white flecks.

    Identification difficulty

    On walls, wood and tarmac in urban as well as rural areas, and is also found in upland regions.

    When to see it

    All year round.

    UK Status

    Widespread and common in Britain

    VC55 Status

    Widespread and common in Leicestershire and Rutland.

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    Leicestershire & Rutland Map

    MAP KEY:

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

    UK Map