Observation 97289: Diploschistes scruposus (Schreber) Norman

When: 2012-06-03

Collection location: Governor Dodge State Park, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

Specimen available



Proposed Names

29% (1)
Recognized by sight
57% (1)
Used references: ID returned by Jim Bennett

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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I agree that it tries to push moss out of its way
By: Andrew Khitsun (Andrew)
2014-11-09 10:38:42 CST (-0500)

not enjoying the company, and definitely not growing on top of moss. The material I manage to collect, though, doesn’t always reflect the entire picture: the ones for this observation are from the fringe and show moss fronds sticking from under the lichen crust. But there are few pieces from the middle of the thallus, clearly showing sandy grains of sandstone as a substrate. I will stick with D.scruposus here.

I’m not sure I understand
By: Jason Hollinger (jason)
2014-11-09 10:25:49 CST (-0500)

Are you saying the specimen in hand is entirely growing on top of moss, and not directly on rock? The photos would seem to be precisely opposite. You can see it expanding and undercutting nearby mosses, but most of it looks to me to be nowhere near moss.

D.muscorum can definitely and often does grow entirely on top of mosses. I think it may occasionally spill over onto bare rock. Zaca would be the expert in this area, but that’s been my limited experience in western North America.

I was just looking at the specimen.
By: Andrew Khitsun (Andrew)
2014-11-09 00:35:56 CST (-0500)

While it shows moss sticking from just under the edge of the specimen, I am not sure how much D.muscorum is supposed to associate with moss. Is it supposed to grow on top of moss, where moss completely insulates it from the rock? Then it’s definitely D.scruposus, not D.muscorum.

I’m still not convinced the other is Diploschistes
By: Jason Hollinger (jason)
2012-06-17 03:03:41 CDT (-0400)

But I’ll definitely go along with it for this one! See how the apothecia have that distinctive eroding rim around the pit-like disk? (I don’t know how to describe it better, sorry.) This is 100% typical and characteristic of Diploschistes. Given that it’s conspicuously growing right on bare rock — not even a hint of soil or moss! — this has got to be D. scruposus.

It seems to be the same as observation 95027 – see discussion there.
By: Andrew Khitsun (Andrew)
2012-06-13 20:24:37 CDT (-0400)

Created: 2012-06-13 20:16:53 CDT (-0400)
Last modified: 2014-11-09 00:33:22 CST (-0500)
Viewed: 66 times, last viewed: 2017-06-13 04:03:24 CDT (-0400)
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