Arum Rust - Puccinia sessilis


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

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


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map