Hollyhock Rust - Puccinia malvacearum

    Alternative names
    Mallow Rust

    Puccinia malvacearum is a rust fungus that galls the leaves and petioles of members of the Malvaceae family including Hollyhock (Alcea rosea). Numerous yellow spots occur on the upper surfaces of the leaves, whilst on the underside of the leaves and on the petioles it causes hard rounded swellings, occasionally yellowish but most often reddish brown and later powder grey.

    Identification difficulty

    It may occur anywhere that the host plants grow.

    When to see it

    Spring and summer.

    UK Status

    Widespread and fairly frequent in Britain, especially in England and Wales.

    VC55 Status

    Fairly frequent 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