Physcia dubia

Physcia dubia

Physcia dubia 1
On rock. From southeastern Arizona.

Physcia dubia 2
("typical" specimen --T. Esslinger)
On Quercus bark. From Mt. Palomar, southern California.

Physcia dubia 3
On rock. From the Rocky Mountains, Colorado.

Physcia dubia 4
On rock. From the Kaibob National Forest, northern Arizona.

Physcia dubia cfr. 1
On granitic rock. From the Mojave Desert, California.

Physcia dubia cfr. 2
On granitic rock. From the Mojave Desert, California.

Physcia dubia cfr. 3
On granitic rock. From the alpine Sierra Nevada, California.