Observation 192307: Caloplaca Th. Fr.

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I’ve been fooled more than once ;-)
By: Andrew Khitsun (Andrew)
2014-12-21 10:40:44 CST (-0500)
Exposure affects color
By: Jason Hollinger (jason)
2014-12-21 04:32:12 CST (-0500)

Caloplaca produce orange pigment (parietin) in relation to the amount of sun they get. So color is tricky. It is both useless (by itself) and very handy (when you can compare with a known species growing in same situation). There’s often some Candelaria or Candelariella around to calibrate what “yellow” is in the local conditions. While Caloplaca flavovirescens will always be paler and/or yellower than C. subsoluta, all else being equal, I’m sure if you looked long enough you could find a specimen of C. subsoluta in a really shaded or wet place which is yellower than the orangest specimen of C. flavovirescens growing in full sun on some bird perch.

I’d love to expllore lichens of Timbuktu,
By: Andrew Khitsun (Andrew)
2014-12-20 22:18:01 CST (-0500)

but still have places in Wisconsin I need to go first. I found Caloplaca subsoluta in UW-Madison arboretum couple of miles away (observation 89362). Those look (to me) darker orange – almost red – but on the other hand are on bird perch rocks sitting in the pond (the ones here are on boulders lining parking lot). I don’t know if different environments will affect how deep the color is.

So embarrassing
By: Jason Hollinger (jason)
2014-12-20 04:50:47 CST (-0500)

I have trouble keeping all the Caloplaca names straight in my little brain sometimes. :(

Okay, yes, ahem, then in that case, I would probably be tempted to guess something like C. subsoluta. You would then, of course, inform me that the nearest report of C. subsoluta is Timbuktu. Which would force me to get off my rump and actually look at some literature. At which point I would realize that we don’t have a snowball’s prayer in Hades of actually naming it.

So instead I will save us all the time and say merely, “that sure is purty, wish they grew like that around here!” :)

The ones in question here are orange circles.
By: Andrew Khitsun (Andrew)
2014-12-19 20:58:26 CST (-0500)

There are three+ in the first photo. And what you identified as C.sideritis with grey thallus is towards the bottom of the first photo.

Are you talking about the small bright yellow ones scattered about?
By: Jason Hollinger (jason)
2014-12-19 19:49:06 CST (-0500)

And the larger orange things are the Caloplaca sideritis?

On granitic boulder.
By: Andrew Khitsun (Andrew)
2014-12-07 22:02:50 CST (-0500)

Sharing it with Caloplaca sideritis and Phaeophyscia as seen in the first photo.

Created: 2014-12-07 21:37:46 CST (-0500)
Last modified: 2014-12-07 21:44:37 CST (-0500)
Viewed: 48 times, last viewed: 2016-10-20 21:13:01 CDT (-0400)
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