When: 2017-11-28

Collection location: Monterey Co., California, USA [Click for map]

35.81°N 120.3144°W 445m [Click for map]

Who: J-Dar

Specimen available

On siliceous rock.

Maybe the same as observation 273901. Need to run chemistry on this one, and probably re-do the other specimen too.



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That’s a relief!
By: Jason Hollinger (jason)
2018-01-09 23:22:12 CST (-0500)
Fresh C and positive C+R reaction
By: J-Dar
2018-01-09 23:03:17 CST (-0500)

8.25% sodium hypochlorite

Yes, that’s definitely got gyrophoric acid
By: Jason Hollinger (jason)
2017-12-03 13:09:42 CST (-0500)

Desert dust can cause a coarse POL+ on top of the cortex and in any epinecral layer present, but yours is clearly POL+ all the way through.

When it’s this strongly POL+ the C reaction should also be pretty strong. Have you changed your supply lately? Does it still bubble vigorously?

POL+ = Gyrophoric Acid?
By: J-Dar
2017-12-03 10:34:16 CST (-0500)

I could not get a C+ reaction for this specimen under a compound scope. I struggle with Acarospora C tests! But, cross-polarized, the cortex showed distinct fine yellowish-gold crystals (see photos), which I think show the presence of at least some Gyrophoric Acid. This would lend support for Acarospora rosulata. As info, there are no specimen records on CNALH for A. rosulata in the Coast Ranges. I’ll check with Knudsen on this one, some day.

Created: 2017-12-02 00:05:54 CST (-0500)
Last modified: 2018-01-09 23:22:12 CST (-0500)
Viewed: 69 times, last viewed: 2019-05-23 16:21:00 CDT (-0400)
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