Observation 115971: Lichen P. Micheli
When: 2012-09-01
Herbarium specimen reported

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That really does sound like thamnolic acid
By: Jason Hollinger (jason)
2012-11-09 02:06:28 CST (-0500)

Maybe this really is Loxospora pustulata. Geez, this is outa my league. Nice observation. Keep practicing that acceptance speech…

Yes, it was pretty intense
By: Andrew Khitsun (Andrew)
2012-11-08 18:57:53 CST (-0500)

On medula, it darkened to a point where I wanted to call it orange, but stopped just short of it.

I was hoping for K+ yellow
By: Jason Hollinger (jason)
2012-11-08 02:04:29 CST (-0500)

I’m wondering if it’s this sterile pustulate-sorediate Aspicilia. I’ve seen it called “cf. simoensis”. Maybe.

That assumed stictic acid. I get nothing if I assume atranorin. But thamnolic acid is another option. I wonder if Loxospora pustulata ever grows so happily on rock?? Was it a particularly vivid intense yellow?

Did some tests…
By: Andrew Khitsun (Andrew)
2012-11-07 18:55:29 CST (-0500)

Thallus K+ yellow, KC-, C-
Medula K+ yellow, KC+ yellow (maybe – see below), C-
(KC + shows yellow, doesn’t dilute K + yellow easily, unless large amount of C is used).

Problem with these sterile things…
By: Jason Hollinger (jason)
2012-11-06 21:02:53 CST (-0500)

Is to know where to start! I have vague suspicions which K and C tests would confirm or dismiss immediately. We could try J. Lendemer’s key, but we need (at least) K, C and KC in order to select the correct subkey right at the very top.

I can do some – no problem.
By: Andrew Khitsun (Andrew)
2012-11-06 20:35:32 CST (-0500)

Any suggestions, or just a regular gamut?

It’s a beautiful thing
By: Jason Hollinger (jason)
2012-11-06 20:22:05 CST (-0500)

Would love to see some spot tests! But I’m guessing that’s not in the cards?

I have no clue…
By: Andrew Khitsun (Andrew)
2012-11-06 20:08:36 CST (-0500)

But check out grains of sand permanently embedded in thallus.

Created: 2012-11-06 20:03:14 CST (-0500)
Last modified: 2015-12-16 14:47:49 CST (-0500)
Viewed: 37 times, last viewed: 2016-10-25 22:52:51 CDT (-0400)
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