Lichens (2x different crustose)

Lichens (2x different crustose)

Observation - Lichens (2x different crustose) - UK and Ireland. Description: What appears to be a gray and green lichen side by side. Taken on a coastal wall - perhaps increased salt concentration in the air influenced the species?

What appears to be a gray and green lichen side by side. Taken on a coastal wall - perhaps increased salt concentration in the air influenced the species?