Observation 211186: Placynthium (Ach.) Gray

When: 2015-07-14

Collection location: Red Granite, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

Specimen available

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It is a pitty that …
By: zaca
2015-07-24 08:31:24 PDT (-0700)

we cannot say anything about them, because this is very nice material.

I don’t know this genus well, or at all.
By: Andrew Khitsun (Andrew)
2015-07-23 20:09:47 PDT (-0700)

I don’t know what else might look like this – I just made an assumption it’s Placynthium based on visual appearance. I am not aware of other crustose black lichen being common here. In fact, Placynthium is fairly rare too.

I don’t think that this one is Placynthium;
By: zaca
2015-07-23 14:32:15 PDT (-0700)

Lichens in that genus have lecideine apothecia whereas this one has lecanorine apothecia (dark disc with a white rim). Moreover the grow form is also different, this one being more light coloured and having somewhat big areolas at the center of thallus, what doesn’t happen in Placynthium. What is it? I don’t know.

Created: 2015-07-22 19:08:58 PDT (-0700)
Last modified: 2015-07-22 19:37:40 PDT (-0700)
Viewed: 46 times, last viewed: 2017-06-20 09:13:25 PDT (-0700)
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