Puccinia piloselloidearum
The rust fungus Puccinia piloselloidearum affects only Mouse-ear-hawkweed (Pilosella) species. Small brown uredinia and telia are produced on the upper leaf-surfaces. It is listed as a gall-causer in Redfern & Shirley (2023).
host 
Photograph the rust on the host. Ensure you have noted the host-plant species in your comments
On Mouse-ear-hawkweed (Pilosella) species in grasslands; pioneering vegetation communities on e.g. brownfield land; waste ground
This is part of the Puccinia hieracii group of related species that affect various species in the Asteraceae
Graham Calow
Huncote, St James the Greater Churchyard
03 June 2019
rust on Pilosella flagellaris subsp. flagellaris
Graham Calow
Huncote, St James the Greater Churchyard
03 June 2019
sue
Coleorton, Church Town, St John's chapel yard
31 May 2026
a few uredinia on underside of leaf
sue
Coleorton, Church Town, St John's chapel yard
31 May 2026
urediniospores
sue
Coleorton, Church Town, St John's chapel yard
31 May 2026
on Mouse-ear Hawkweed
sue
Coleorton, Church Town, St John's chapel yard
31 May 2026
uredinia, mainly on leaf uppersides
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Species profile
- Species group:
- fungus
- Kingdom:
- Fungi
- Order:
- Pucciniales
- Family:
- Pucciniaceae
- Records on NatureSpot:
- 2
- First record:
- 03/06/2019 (Calow, Graham)
- Last record:
- 31/05/2026 (Timms, Sue)
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