Lichens

PacNWMike

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Orbmiser

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archaeopteryx

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I think there's a good case for Cladonia macilenta here but keying it fully requires spore measurements.
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ralf-11

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archaeopteryx

Gambian sidling bush
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it can't be moss because I found it in the desert on a sun drenched canyon rim
Considering the abundance of Syntrichia caninervis on the Colorado Plateau it may be best to be cautious of that assumption (Pan 2016). That nice backlit image isn't much to work from for identification but hairpoints are a regular arid moss adaptation (more on adaptations in Stark 2003, Tao 2012 is good too if your library has access). Statistically speaking, it wouldn't surprise me if this is the epilithic desert moss Grimmia orbicularis as it seems common near your location. A number of other Grimmia species adopt similar habits. Tortula might be another candidate genus.

I recently rebooted the moss thread but nobody's posted anything xeric (dry) as yet, just mesic (moist) to subhydric (not actually in water). ;)
 
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