Observation 34771: Rhizocarpon concentricum (Davies) Beltr.
When: 2010-03-13
No herbarium specimen

Notes: Found on the southern exposure hill side,growing on a sand stone rock. These are very small. growing in a circular pattern.

[admin – Sat Aug 14 02:07:40 +0000 2010]: Changed location name from ‘West shore Boat ramp area Plum Orchard Lake Wildlife Management Area Fayette Co. West Virgnina’ to ‘Plum Orchard Lake Wildlife Management Area, Fayette Co., West Virginia, USA

Proposed Names

28% (1)
Recognized by sight: found growing on sand stone.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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little black dots
By: Jason Hollinger (jason)
2010-03-14 15:52:15 HST (-1000)

People build entire careers around studying little black dots like this! :)

The proper technique involves approaching the rock reverently… with a big hammer and chisel (protective eye-wear might be advised). You can also scrape one or two apothecia into a little baggie if you prefer to go low-impact.

Once it arrives home, either slice one of the black dots carefully with a very sharp razor blade (almost impossible to do unless still attached to a flake of rock), or alternatively scrape out the inside of one with a needle. Place this in a drop of water or KOH.

(KOH does help break up the asci and paraphyses in most cases, but color changes are often critical, so it’s best to start in water, then add a drop of KOH under one of the edges of the coverslip and draw it through with a piece of tissue placed on the opposite edge. Note any color changes as the KOH hits the sample. This takes some practice and coordination.)

But, yeah, even just placing a glob of goop in a drop of KOH and squashing it will give you all sorts of nice asci and spores and paraphyses (one hopes). It might not be enough, but it will be light years ahead of a macro photo, no matter how beautiful! That would be really cool to see.

seen it
By: Erin Page Blanchard (CureCat)
2010-03-13 18:10:33 HST (-1000)

I found this once before… It was cool enough, so I asked Alan to take a photo of it. I have bugged him a few times to post it…

I remember we looked at it under the microscope… It was reeeeally boring, there was not much to see aside from what looked like a chip of black paint.

I was hoping
By: Eddee (eddeeee)
2010-03-13 17:42:18 HST (-1000)

I was hoping you would know this one. Ill have to go back tomorrow and retrieve this one. Ok spores for lichen can i break it up and put it into KOH and look at the spoors that way under a scope? what is the best method?

By: Jason Hollinger (jason)
2010-03-13 17:29:15 HST (-1000)

Have you ever seen such striking concentric growth patterns on a… what is that anyway? a Buellia?? I’d need to look at the spores on this one.

Created: 2010-03-13 14:59:46 HST (-1000)
Last modified: 2010-08-26 14:37:59 HST (-1000)
Viewed: 108 times, last viewed: 2016-10-27 02:06:44 HST (-1000)
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