Observation 88807: Caloplaca saxicola (Hoffm.) Nordin
When: 2011-07-21
No herbarium specimen

Proposed Names

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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And I just bumped X. elegans back up
By: Jason Hollinger (jason)
2012-03-08 21:19:19 PST (-0800)

Haha! I’m not willing to give up on it yet. :)

Well, what the heck..
By: Andrew Khitsun (Andrew)
2012-03-08 20:59:52 PST (-0800)

I bumped down the original choice, and bumped up Jason’s choice. Right now, C.saxicola wins. Going once, twice…

I agree with Chris
By: Jason Hollinger (jason)
2012-03-08 20:10:07 PST (-0800)

Leave it here, but also create another observation for just photo 3.

(Sorry, didn’t mean for that new proposed name to “win”… just wanted to make it clear we weren’t sure of the ID of these things.)

Thanks Chris
By: Andrew Khitsun (Andrew)
2012-03-08 20:09:35 PST (-0800)

I’ll reuse the photo elsewhere, but leave it here too. I’d probably go ahead and change the name here to Caloplaca saxicola – it’s tentative anyway – unless you guys think I shouldn’t.

reuse a photo
By: Chris Parrish (kitparrish)
2012-03-08 19:46:54 PST (-0800)

One possibility is to reuse photo 3 in another observation, but also keep it here to illustrate the discussion.

Third photo
By: Andrew Khitsun (Andrew)
2012-03-08 17:59:47 PST (-0800)

Yes, the third photo is definitely it. And it’s so different from the rest, either because of the substrate or being a different species, that I’d like to decouple it from the rest of them into its own observation. I’m not sure how to do it, though – when it’s gone, the entire discussion here will become pointless (and the third photo will be different). How things like that are usually done?

Ah yes, I see I have sown confusion!
By: Jason Hollinger (jason)
2012-03-08 17:48:17 PST (-0800)

You are not alone in being confused about this group. I recently went through a few dozen photos with Curtis Björk, trying to decide which were X. elegans and which were various lobate species of Caloplaca (C. trachypylla, C. saxicola, etc.) In the end, we dicded we’d have to send half the specimens to Westberg for verification! Haha! Photos on the web and in various popular lichen guides don’t help the matter in the least. I’ve given up trying with the ambiguous cases until further notice. :) (We can all agree that photo 3 is _X. elegans, though, right???)

Yet on the other hand…
By: Andrew Khitsun (Andrew)
2012-03-08 15:45:09 PST (-0800)

Photos of X.elegans in Brodo show very wide, flat and appressed lobes.

Different substrate
By: Andrew Khitsun (Andrew)
2012-03-08 15:27:33 PST (-0800)

Looking at my records, what I think is Caloplaca saxicola was all over the pier at Kewaunee harbor, while what I think is Xanthoria elegans (third photo) was on the boulder at the entrance.

By: Andrew Khitsun (Andrew)
2012-03-08 15:22:36 PST (-0800)

OK, so I made comment below looking at the third photo Jason commented on. Now I want to rethink the whole thing. After searching online and in the books, I have reasons to believe that the third photo is an oddball here, and I think the rest of the photos are Caloplaca saxicola. I don’t know if it’s a reliable feature, but it seems X.elegans has narrow, convex lobes, while C.saxicola has more flattened lobes. Help!

Caloplaca saxicola
By: Andrew Khitsun (Andrew)
2012-03-08 14:21:27 PST (-0800)

Caloplaca saxicola is supposed to be in the area, but very rare. In fact, I was just examining the specimen’s photo on my website under C.saxicola, and I think it was X.elegans. I think this one is X.elegans too. C.saxicola is said to be more appressed, almost impossible to remove – otherwise they’re supposed to be very similar. I just have a hunch this one is X.elegans. It’s just a hunch – I may be wrong.

Other option is Caloplaca
By: Jason Hollinger (jason)
2012-03-07 22:23:17 PST (-0800)

But maybe no lobate species of Caloplaca in your area? I’d say the third photo is Xanthoria elegans for sure: narrow discrete lobes all the way into the interior of the thallus.

Created: 2012-03-07 16:18:37 PST (-0800)
Last modified: 2012-03-08 21:18:53 PST (-0800)
Viewed: 152 times, last viewed: 2016-10-26 19:40:10 PDT (-0700)
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