Observation 87561: Caloplaca flavovirescens (Wulfen) Dalla Torre & Sarnth.
When: 2011-07-10
No herbarium specimen
0 Sequences

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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You’re right, that’s probably it
By: Jason Hollinger (jason)
2012-02-10 03:17:20 CST (-0500)

Hard to beat having a specimen in hand under a scope. The smooth texture over the bumpy sandstone would probably be perfectly obvious up close. But we do the best we can with photos!

Bumpy sandstone?
By: Andrew Khitsun (Andrew)
2012-02-09 19:47:47 CST (-0500)

Here is another one to add to your collection (from Lichens of WI by Thomson):
“Thallus crustose, chinky areolate to coarsely granular papillate, sometimes showing whitish or dark prothallus…”
I don’t know if we’re talking about the same thing, but I think those lumps just follow the surface of the sandstone: check around the lichen too – it looks pretty bumpy to me.
On the other hand, I just don’t know too many species, and default to the familiar ones.

I think so…
By: Jason Hollinger (jason)
2012-02-09 02:48:00 CST (-0500)

But see how this set has a “lumpy” thallus. I don’t know if that is significant. I’m used to it being smooth. C. flavovirescens is described variously as:

Sonoran Flora (Wetmore): “areolate, margin abrupt at edge, black prothallus; surface yellowish orange to greenish yellow, smooth”
Lichens of N. Amer. (Brodo): "cracked-areolate to minutely warty, sulphur yellow
Bruce Ryan’s keys: “greenish yellow to whitish yellow, hypothallus gray to black, thallus rimose-areolate, often as large conspicuous single patches”
Ozarks flora (Harris): “thallus pale yellow to grayish or brownish yellow, thin, continuous to rimose”

(Hmmm, Harris has a great Caloplaca key, we should try applying it to some of your more problematic specimens.)

Created: 2012-02-08 23:01:05 CST (-0500)
Last modified: 2012-02-09 02:39:29 CST (-0500)
Viewed: 33 times, last viewed: 2017-06-10 09:59:43 CDT (-0400)
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