Lichen on slate

Lichen on slate

Observation - Lichen on slate - UK and Ireland. Description: Red-brown crustose thallus with cracks. Black lecideine apothecia with centres of discs projecting out. Possibly Rhizocarpon oederi.

Red-brown crustose thallus with cracks. Black lecideine apothecia with centres of discs projecting out. Possibly Rhizocarpon oederi.