Aspicilia contorta subspecies hoffmanniana - Aspicilia contorta subsp. hoffmanniana

    Description

    Differs from subsp. contorta (with which it may grow) in its sometimes darker colour, more scurfy surface and areoles more distinctly angled when conjoined and more closely packed at the thallus margin. A. calcaria differs in its smooth thallus surface and well defined, often radially cracked thallus margin.

    Habitat

    On soft limestones and becoming very common on concrete and on cement in urban areas.

    When to see it

    All year round.

    UK Status

    Widespread and increasingly common in Britain.

    VC55 Status

    Fairly frequent in Leicestershire and Rutland.

    Leicestershire & Rutland Map

    UK Map