Sycamore Tarspot - Rhytisma acerinum

    Alt Name
    Tarspot Fungus
    Description

    This fungus causes a raised shiny black spot to appear on the leaves of the host trees.

    Identification difficulty
    Habitat

    Grows on Sycamore and sometimes on other species of Maple.

    When to see it

    Late Summer until the leaves fall in Autumn.

    Life History

    The fungus overwinters on fallen leaves. Fresh spores are produced in Spring, these have a sticky coating. The spores attach themselves to the new leaves as they form. The fungus does no lasting harm to its host tree.

    UK Status

    Very common and widespread in Britain.

    VC55 Status

    Very common in Leicestershire and Rutland.

    Leicestershire & Rutland Map

    UK Map