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Notes:
Sonoran Desert on the west slope foothills of the Tucson Mountains
growing on biotic soil crust; Dec 25, 2013
texture and feel suggestive of charcoal briquettes for a BBQ, but I did not try to break one open

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Proposed Names

56% (1)
Recognized by sight: This looks a lot like Schultz’s “hypertrophic” form of P. arizonica, but P. subnigra is also common in soil crust communities (in southeastern NV at least)

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