Caloplaca arcis

    Description

    A tiny, bright yellow or orange-tinted Caloplaca that forms rosette-like clusters of areoles, minutely squamulose or lobed at the margins and bearing spherical blastidia up to 0.1mm across; apothecia with yellow-orange discs, thalline margins generally persistent.

    Identification difficulty
    Recording advice

    Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.

    Habitat

    On walls and in churchyards.

    When to see it

    All year round.

    UK Status

    Widespread and locally frequent.

    VC55 Status

    Status in Leicestershire and Rutland not known.

    Leicestershire & Rutland Map

    MAP KEY:

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

    UK Map