Porpidia flavocaerulescens ("orange boulder lichen") on rock, along the Denali Highway, Alaska. The black discs are fruiting bodies of the lichen fungus. Dark lines form where two individual lichens meet.
Photograph copyright Stephen/Sylvia Sharnoff
Porpidia flavocaerulescens ("orange boulder lichen") on rock, along the Denali Highway, Alaska. The black discs are fruiting bodies of the lichen fungus. Dark lines form where two individual lichens meet.
Photograph copyright Stephen/Sylvia Sharnoff