Arum Rust - Puccinia sessilis
Description
This rust fungus commonly infects Lords-and-Ladies (Arum maculatum) and Ramsons (Allium ursinum) causing yellow to orange circular patches on leaves. On the underside it produces raised orange aecia commonly covered in spores.
Similar Species
Spermosporina aricola
Identification difficulty

Habitat
Where the host plants occur.
When to see it
When the host plants are in leaf.
UK Status
Widespread and fairly frequent in Britain.
VC55 Status
Status in Leicestershire and Rutland not known.
Leicestershire & Rutland Map
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MAP KEY:
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015