Observation 102298: Caloplaca microphyllina (Tuck.) Hasse

When: 2012-07-13

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

Who: Andrew Khitsun (Andrew)

Specimen available

Proposed Names

18% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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ID confirmed by Jim Bennett
By: Andrew Khitsun (Andrew)
2014-09-29 18:49:07 MST (-0700)

And the black dots I was referring to turned out to be Amandinea punctata

You can’t expect to get as close as a microscope!
By: Jason Hollinger (jason)
2012-10-08 10:57:52 MST (-0700)

Looking at this fresh, I’m pretty convinced it’s C. microphyllina.

I added few more pics of these.
By: Andrew Khitsun (Andrew)
2012-10-08 09:22:23 MST (-0700)

But they’re not better than previous – I can’t overcome my camera’s limitations, it seems.

Ah, the allure of black dots…
By: Jason Hollinger (jason)
2012-07-21 22:09:29 MST (-0700)

I read somewhere (Thomson?) that this species is downright common in that area. Maybe overlooked?

I totally missed that.
By: Andrew Khitsun (Andrew)
2012-07-21 21:13:09 MST (-0700)

In fact, I didn’ realise it was anything of worth – just “usual boring” Caloplaca. I was actually taking photos of some black dots (always mysterious since nobody knows what they are – see observation 102401). But Caloplaca was lush and thick there, so I focused on that colony few times. And then, when identifying under the microscope, I didn’t pay attention to the lobate margin – I saw the tiny lobes, but didn’t really consider them to be lobes because they’re not really standing out. Something for me to learn here, it seems. By the way, C. microphyllina is listed for the county in question, so people found it there before.

I think the lobate margin is more important in this case
By: Jason Hollinger (jason)
2012-07-20 23:09:34 MST (-0700)

Hmmm. Look at the description of C. microphyllina in Thomson. And look at the description in Sonoran Flora. Oh! I see what happened. The word “concolorous” in the Thomson key is supposed to mean that the rim is concolorous with the thallus not the apothecial disk! It woks perfectly.

Congratulations, you now have by far the finest photo of this species on-line! Mine on ways.net looks really sad now… :(

K+ red-violet, Sorediate, apothecial disc darker than rim.
By: Andrew Khitsun (Andrew)
2012-07-20 20:34:03 MST (-0700)

Using Thomson’s keys in Lichens of WI, I arrived at Caloplaca discolor Apparently, I got lost somewhere along the way.

Created: 2012-07-20 20:24:26 MST (-0700)
Last modified: 2012-07-21 21:13:43 MST (-0700)
Viewed: 104 times, last viewed: 2017-12-05 12:23:25 MST (-0700)
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