Observation 216050: Cladonia petrophila R.C. Harris

When: 2015-08-22

Collection location: Pier Natural Bridge County Park, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

Specimen available

Proposed Names

45% (2)
Recognized by sight: densely vertically-packed pale gray small squamules
Based on chemical features: K+y P+y turning slowly weak orange-red
47% (2)
Eye3 Eyes3
Used references: ID suggested by Jason Hollinger
Based on chemical features: atranorin + fumarprotocetraric + sphaerophorin

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
I think this was a subtle K reaction
By: Jason Hollinger (jason)
2016-02-08 20:12:35 CST (-0500)

I don’t have any notes about the lichenostigmoid thing — that’s my latest favorite group! recently spent several days gathering literature for every species ever described, now it’s almost fun ;) — but the box is buried somewhere under a mountain of poorly-sorted specimens at the moment. :(

Have you tested blue-gray part of bright-green part?
By: Andrew Khitsun (Andrew)
2016-02-08 19:39:45 CST (-0500)

Apparently two or more species again pretending to be one? But I couldn’t get K+ out of any of them – my KOH must be getting old. Didn’t try P. By the way, the dark filaments are looking like Lichenostigma or something similar. Do you have parts afflicted by them?

I agree something is afflicting this
By: Jason Hollinger (jason)
2016-01-09 00:14:04 CST (-0500)

But it’s not C. caespiticia. The squamules of C. caespiticia are finely-dissected. This has small tongue-shaped squamules. It is not uncommon to see vast colonies of C. cariosa without any podetia at all, especially on sandy soil like this.

The dark appearance is from the multiple dark “veins” running across the sufrace.
By: Andrew Khitsun (Andrew)
2015-09-13 21:21:17 CDT (-0400)

They’re probably filaments of parasitic fungus afflicting this lichen. I’ve seen the same or similar on Xanthoparmelia and others.

Created: 2015-09-13 20:36:07 CDT (-0400)
Last modified: 2017-04-05 21:21:31 CDT (-0400)
Viewed: 58 times, last viewed: 2018-01-01 17:28:23 CST (-0500)
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