Observation 157218: Myelochroa aurulenta (Tuck.) Elix & Hale

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Recognized by sight
86% (1)
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Used references: Identified by Jim Bennett

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Myelochroa aurulenta seems plausible, if it can be on rock.
By: Andrew Khitsun (Andrew)
2014-02-05 16:45:47 MST (-0700)
Those are called pustules
By: Jason Hollinger (jason)
2014-02-05 15:45:56 MST (-0700)

If rhizines are simple, can only be Myelochroa aurulenta or Parmelinopsis spumosa (= Hypotrachyna spumosa now). If rhizines were forked, then several Hypotrachyna would be possible (but unlikely given how far north you are). I find Myelochroa aurulenta on rock frequently in the Smokies.

Stumped :-(
By: Andrew Khitsun (Andrew)
2014-01-05 12:33:19 MST (-0700)

Either I have a brain fart (I’ve been known for those), or this is a genus I didn’t deal with before. At first, I thought it was Myelochroa aurulenta. Then I thought: wait a second – it’s on rock (quartzite in this case). So I took photos and samples. I didn’t get any definitive K or C tests out of it, although K test on cortex leaves permanent stain that I’d call green, but some people might call yellowish. The structures on top of the lobes are hard to define: lobulate isidia? isidiate lobules? The lower side is tan at tips changing to brown changing to black going inwards. Rhizines are simple, matted toward the center of thallus.

Created: 2014-01-05 12:18:22 MST (-0700)
Last modified: 2014-05-28 22:50:25 MDT (-0600)
Viewed: 37 times, last viewed: 2017-06-17 19:07:28 MDT (-0600)
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