Observation 90946: Xanthoparmelia plittii (Gyeln.) Hale
When: 2012-03-25
Herbarium specimen reported

Proposed Names

57% (1)
Eye3 Eyes3
Used references: ID provided by Jim Bennett

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Well darn!
By: Jason Hollinger (jason)
2014-09-28 18:52:02 CDT (-0400)

You’re causing me to question my faith!

Jim Bennett tested medula K+Y→OR and returned ID X.plittii
By: Andrew Khitsun (Andrew)
2014-09-28 18:16:44 CDT (-0400)
Tested that Xanthoria few days ago.
By: Andrew Khitsun (Andrew)
2012-03-26 17:52:44 CST (-0500)

So my K should be OK :-)

Wait until you see proper K+ test
By: Jason Hollinger (jason)
2012-03-26 01:59:02 CST (-0500)

There’s no way to know this ahead of time, but trust me, it’s not subtle when it happens. …Assuming your KOH solution is good! I’m reminded of a world acclaimed lichenologist who recently misidentified one of my specimens this winter because of reagents that had gone “off”. It happens. We should all keep a stack of test subjects at hand to verify our reagents. You posted a good specimen of Parmotrema hypotropum recently. Or Parmelia. If you ever find any of those in abundance, grab a handful. They both have excellent K+y-r reactions. Or you could grab some Xanthoria, too.

Isidiate, lower surface pale, medula K-
By: Andrew Khitsun (Andrew)
2012-03-25 21:13:39 CST (-0500)

Again, it was very difficult to test with K – I have to learn to understand the colors. Medula didn’t seem to change much, except initial pale yellowing, but the lower surface was looking greenish-yellowish when treated with K. So maybe it’s X.plittii?

Created: 2012-03-25 21:02:44 CST (-0500)
Last modified: 2014-09-28 18:15:40 CDT (-0400)
Viewed: 66 times, last viewed: 2017-06-12 19:58:15 CDT (-0400)
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