Porpidia contraponenda

Porpidia contraponenda 1
On rock. From near Mt. Baker, Washington.

Porpidia contraponenda 2
On coastal rock. From the north coast of California.

Porpidia contraponenda 3
On coastal rock. From the north coast of California.

Porpidia contraponenda 4
On coastal rock. From the north coast of California.

Porpidia contraponenda 5
(formerly called Porpidia diversa)
On rock. From the North Shore of Lake Superior, Ontario.