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Physcia dubia

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Physcia dubia 1
On rock. From southeastern Arizona.
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Physcia dubia 2
("typical" specimen --T. Esslinger)
On Quercus bark. From Mt. Palomar, southern California.
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Physcia dubia 3
On rock. From the Rocky Mountains, Colorado.
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Physcia dubia cfr. 1
On granitic rock. From the Mojave Desert, California.
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Physcia dubia cfr. 2
On granitic rock. From the Mojave Desert, California.
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Physcia dubia cfr. 3
On granitic rock. From the alpine Sierra Nevada, California.


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