Observation 87955: Physcia subtilis Degel.

When: 2011-10-09

Collection location: Devil’s Lake State Park, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

No specimen available



Proposed Names

63% (2)
Eye3 Eyes3
Recognized by sight
28% (1)
Recognized by sight: see comments for observation 97114

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Well what are you waiting for, then? :)
By: Jason Hollinger (jason)
2012-02-19 18:56:39 CST (-0600)
No specimen for these, sorry :-(
By: Andrew Khitsun (Andrew)
2012-02-19 18:16:44 CST (-0600)
Do you have specimens of these?
By: Jason Hollinger (jason)
2012-02-19 14:29:54 CST (-0600)

I would love to examine all three under the scope with careful spot tests and everything. Each individually, in light of your earlier observations, I would probably call P. subtilis. Yet you’re right, they all three have a different overall look. There are microscopic characters that can be used to verify: cellular structure of upper and lower cortex, for example. Maybe even spore characters.

Can’t figure…
By: Andrew Khitsun (Andrew)
2012-02-18 22:50:50 CST (-0600)

Something bothers me here – a lot. While the first two photos show “typical” P.subtilis, the bottom two have two different looking lichen, non of which look like the top two. All of the specimen are from the same group of boulders. I photograph everything that looks like P.subtilis everywhere, hoping to come across elusive P.dakotensis – only discovered once in what is now Madison subdivision.

Created: 2012-02-18 22:35:06 CST (-0600)
Last modified: 2012-06-12 18:57:10 CDT (-0500)
Viewed: 41 times, last viewed: 2017-06-10 09:23:58 CDT (-0500)
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