Lichen on boulder in stream

Lichen on boulder in stream

Observation - Lichen on boulder in stream . Description: Lichen with whitish crustose thallus growing near top of 2m high limestone boulder in a stream. Black lecideine apothecia. Possibly Farnoldia jurana.

Lichen with whitish crustose thallus growing near top of 2m high limestone boulder in a stream. Black lecideine apothecia. Possibly Farnoldia jurana.