Observation 160097: Punctelia caseana Lendemer & Hodkinson

When: 2013-07-30

Collection location: Toft Point State Natural Area, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

Specimen available

Proposed Names

-27% (2)
Recognized by sight
-2% (2)
Used references: ID provided by Jim Bennett

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
After all, P.borreri was shot down in favor of P.caseana
By: Andrew Khitsun (Andrew)
2014-07-07 16:58:19 PDT (-0700)
By: Jason Hollinger (jason)
2014-06-26 00:59:25 PDT (-0700)

It would probably be a useful study to see the specimen again. P. borreri is supposed to have a black lower surface. But that’s (obviously!) not always an easy character to diagnose. I better pay more attention to that as well, because otherwise this could easily be P. caseana. Who knew?

Jim Bennett provided ID Punctelia borreri
By: Andrew Khitsun (Andrew)
2014-06-25 19:36:23 PDT (-0700)

And he says this is a second state record. Medula C+ red, cortex K+ yellow.

Don’t be hard on yourself
By: Jason Hollinger (jason)
2014-02-21 18:21:58 PST (-0800)

I always get this one wrong at first in the field. It’s not until I see the K+y cortex that I usually catch my mistake. It’s not very “Punctelia-like”, is it?

Shame on me for not recognizing Punctelia
By: Andrew Khitsun (Andrew)
2014-02-21 18:05:47 PST (-0800)

I only had one specimen in the past of P.caseana, and that one was totally different, craggy looking thing on a stick.

The color fooled me, too
By: Jason Hollinger (jason)
2014-02-21 17:07:17 PST (-0800)

I thought you were right.

There is a form of Punctelia caseana in high elevations of Smokies that grows really large and Cetrelia-like like this. Oh wow, yes, look how similar this is to yours: observation 99965. And it’s pale brownish underneath the way you describe. It should be very weakly C+ fleeting pink in the medulla, but I don’t think I’d let a negative reaction change my opinion.

Things just don’t match
By: Andrew Khitsun (Andrew)
2014-02-20 18:54:14 PST (-0800)

Lower surface white to light brown, short abundant rhizines. Upper surface with pronounced “burnt” edges. Upper cortex reacts yellow to K+, but not medula.

Created: 2014-02-20 18:43:01 PST (-0800)
Last modified: 2014-07-07 16:56:00 PDT (-0700)
Viewed: 52 times, last viewed: 2017-06-17 21:34:55 PDT (-0700)
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