Arthonia atra
Whitish or green-grey thallus, the short (1 mm), prominent lirellae with black looking central slit often densely crowded at centre of thallus.
Common on the trunks, branches and twigs of trees with smooth shaded bark, rarely found on fences. Forms extensive mosaics on young trees but tends to avoid nutrient-enriched bark.
All year round.
Widespread and fairly frequent in Britain.
Fairly frequent in Leicestershire and Rutland.
David Nicholls
Ratby, Wirlybones Wood
04 January 2024
Melinda Bell
Cadeby,Spring Wood
21 March 2024
Melinda Bell
Cadeby,Spring Wood
21 March 2024
Melinda Bell
Shepshed,Jubilee Path
12 February 2025
Melinda Bell
Charley Woods
02 February 2024
Melinda Bell
Nanpantan,Jubilee Wood
03 March 2024
Melinda Bell
Charley Woods
02 February 2024
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020
UK Map
Species profile
- Species group:
- lichen
- Kingdom:
- Fungi
- Order:
- Arthoniales
- Family:
- Arthoniaceae
- Records on NatureSpot:
- 18
- First record:
- 15/03/2014 (Nicholls, David)
- Last record:
- 26/12/2025 (Hollingworth, Jane)
Total records by month
% of records within its species group
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