Hollyhock Rust - Puccinia malvacearum
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.
It may occur anywhere that the host plants grow.
Spring and summer.
Widespread and fairly frequent in Britain, especially in England and Wales.
Fairly frequent in Leicestershire and Rutland.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015