Observation 212040: Lecanora polytropa (Hoffm.) Rabenh.

Proposed Names

29% (1)
Eye3
Recognized by sight
68% (1)
Eyes3
Based on microscopic features: Spores 10×5, simple, hyaline; thallus K-, KC+, epruinose apo; epihymenium light brown, no crystals

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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That’s correct, tons of them here,
By: Andrew Khitsun (Andrew)
2017-03-22 20:24:57 CDT (-0400)

except in door county dolomite slabs and pieces are so overwhelmingly common that I haven’t seen other rocks there before (which just means I haven’t noticed them).

This rock has the shape of a (small) erratic
By: Jason Hollinger (jason)
2017-03-17 19:50:51 CDT (-0400)

I imagine you need to expect to come across similar little boulders of granite carried in from the Canadian Shield(?) throughout Wisconsin.

L. polytropa really seems to prefer granite out west, too.

I really don’t know my rocks :-(
By: Andrew Khitsun (Andrew)
2017-03-17 19:38:13 CDT (-0400)

While the picture in this observation looks like a granite, I didn’t know there were granites present at Toft Point. The whole place is littered with chunks big and small that broke off from the Niagara Escarpment and the dolomite the peninsula is composed of, so I assumed this was a dolomite too, despite its roundish forms.

substrate question
By: Jim Bennett (Lichenman)
2017-03-17 11:18:52 CDT (-0400)

The specimen I’m studying is on granite, not dolomite

Looks a bit like one of the many forms of L. polytropa
By: Jason Hollinger (jason)
2015-08-08 12:04:57 CDT (-0400)
On dolomite loose chunks on the rocky beach
By: Andrew Khitsun (Andrew)
2015-08-05 21:57:24 CDT (-0400)

Created: 2015-08-05 21:32:52 CDT (-0400)
Last modified: 2017-03-17 11:18:11 CDT (-0400)
Viewed: 58 times, last viewed: 2017-03-23 08:39:04 CDT (-0400)
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