Mahonia Rust - Cumminsiella mirabilissima

    Description

    The rust fungus Cumminsiella mirabilissima affects the leaves of Berberis repens, Mahonia aquifolium and Mahonia japonica usually producing numerous small red spots on the upper leaf surface with brown uredinia beneath. Aecia are uncommon.

    Identification difficulty
    Recording advice

    Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed.

    Habitat

    Where the host plants occur.

    When to see it

    When the host plants are in leaf, most often towards autumn.

    Life History

    Oligophagous.

    UK Status

    Widespread in much of Britain.

    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