Rust Fungus - Puccinia urticata
Description
Puccinia urticata is a rust fungus which develops on the stems and leaves of Common (Stinging) Nettle or Small (Annual) Nettle. It often starts as small orange blisters or swellings. Close examination may reveal the pinhead-like fruiting bodies of the fungus.
Identification difficulty

Habitat
Anywhere that the host plant grows
Life History
The spores may spread to other nettles or to various sedges where the telial stage of the lifecycle continues without causing a gall to form.
UK Status
Common and widespread in Britain.
VC55 Status
Fairly common in Leicestershire and Rutland.
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