Umbilicaria mammulata

Umbilicaria mammulata 1
On rock. From central Massachusetts.

Umbilicaria mammulata 2
On rock. From the White Mountains, New Hampshire.

Umbilicaria mammulata 3
On rock. From central Massachusetts.

Umbilicaria mammulata 4
On rock. From Acadia National Park, Maine.

Umbilicaria mammulata 5
On rock. From central Massachusetts.

Umbilicaria mammulata 6
On rock. From the North Shore of Lake Superior, Ontario.

Umbilicaria mammulata 7
(tentative ID only from photo and field)
On rock. From the North Shore of Lake Superior, Ontario.

Umbilicaria mammulata 8
On rock. From central Massachusetts.