Tranzschelia pruni-spinosae
Tranzschelia pruni-spinosae affects the primary host Prunus spinosa. Brown uredinia and black telia are carried on the leaf undersides. Aecia and spermogonia are on the alternate host, Anemone sp. It is not a gall-causer on either host.
Tranzschelia discolor
microscopy 
Photograph the smut and the host; note the host-plant in your comments. We recommend that this is confirmed by an expert before submission to Naturespot; microscopic examination may be needed
Prunus speces, including blackthorn
sue
Ratby Burroughs
11 February 2025
conf. G Hall
sue
Ratby Burroughs
11 February 2025
sue
Ratby Burroughs
11 February 2025
Leicestershire & Rutland Map
Enter a town or village to see local records
MAP KEY:
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020
UK Map
Species profile
- Common names
- Blackthorn Rust
- Species group:
- fungus
- Kingdom:
- Fungi
- Order:
- Pucciniales
- Family:
- Tranzscheliaceae
- Records on NatureSpot:
- 26
- First record:
- 14/09/2017 (lemmon, roy)
- Last record:
- 11/10/2025 (Timms, Sue)
Total records by month
% of records within its species group
10km squares with records
The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.
In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.