The British Lichen Society
@britishlichensociety.org.uk
Reposted by The British Lichen Society
2/2 …fortunately a bit distinctive. Note large, black apothecia with pruina (powdery coating) and umbos (plugs of sterile tissue), which are characteristic of this species. Chemical tests still necessary to confirm identification: K+ yellow turning red, and Pd+ yellow-orange, from norstictic acid.
September 2, 2025 at 4:28 PM
2/2 …fortunately a bit distinctive. Note large, black apothecia with pruina (powdery coating) and umbos (plugs of sterile tissue), which are characteristic of this species. Chemical tests still necessary to confirm identification: K+ yellow turning red, and Pd+ yellow-orange, from norstictic acid.
