Taxon
Lecanora gangaleoides
Conservation Status
LC (Key)
BLS Number
653
Identification
Thallus smooth or warted, grey but often with a green/brown tinge. Usually fertile, with apothecia to 2mm across with a black disc and a wide pale grey margin. Cutting through an apothecium shows the pale green interior. If the thallus is scratched, it usually reveals an orange pigment.
Chemistry: Thallus K+ yellow, P+ yellow/red, UV- or pale orange.
Similar species: Easily confused with Tephromela atra but cutting through an apothecium of T. atra shows a dark purple interior.
Habitats
Common on siliceous rocks, especially near the sea, but also locally inland. More rarely found on worked wood.
Distribution Map
Distribution
Widespread but infrequent in central and south-eastern England.
References
Text by David Brabban & Maxine Putnam