Observation 87578: Candelariella aurella (Hoffm.) Zahlbr.
When: 2011-07-20
No herbarium specimen

Proposed Names

2% (2)
Recognized by sight
56% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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By: Andrew Khitsun (Andrew)
2012-03-15 20:49:19 PDT (-0700)

I’ll tentatively call it that – there is no way to tell till I find this one again and test it. But it does look like Sharnoff’s and Stridvall’s Candelariella aurella.

I vote Candelariella
By: Jason Hollinger (jason)
2012-02-10 01:03:03 PST (-0800)

The orange Caloplaca all have at least orange apothecia disks, even if the thallus is yellow (as in Caloplaca flavovirescens). These are yellow everywhere. Got to be Candelariella. Did you rule out Candelariella vitellina, Chris? Is this thallus not well-enough developed to be C. vitellina? I thought C. aurella was entirely endolithic, but I don’t pretend to be an expert in the genus.

By: Chris Parrish (kitparrish)
2012-02-09 19:25:54 PST (-0800)

I just patched that up. Thanks!

And here are Thompson’s comments on the substrates of those two species:

Candelariella aurella This species grows mainly on calcareous rocks and also on old bones but may occur on bark in dusty places.

Caloplaca holocarpa This is a common bark inhabiting species, especially on Populus, but may also occur on rocks.

By: Andrew Khitsun (Andrew)
2012-02-09 19:16:08 PST (-0800)

I believe it to be sandstone, but I might be wrong. I’m not very proficient with rocks and boulders just laying on the ground, like this one, separated from the original rock formation. I’m trying to find if there is anything in the record for this species identifying the substrate – probably not.
On the different note, in the comments below, should it be Caloplaca holocarpa (not Candelina) and Candelariella aurella (not Candelaria)?
Also, rockwise, there is a chemical mess here in WI. Sandstones are often permeated by lime leached from the dolomitic limestone that caps many sandstone formations, so you never know what PH it will have by just looking at it.

short list
By: Chris Parrish (kitparrish)
2012-02-09 18:37:20 PST (-0800)

Here is my short list, with notes from Thompson and links to photos by the Stridvalls:

Candelariella aurella (rarely collected in Wisconsin; thallus K-)
Caloplaca holocarpa (common over much of the state; thallus K-; disk K+ purple)

Those crenulate apothecial margins suggest Candelariella aurella. Byrain has some nice photos from California : MO Observation 67999

What is the substrate here?

Created: 2012-02-09 16:51:02 PST (-0800)
Last modified: 2012-03-15 20:56:28 PDT (-0700)
Viewed: 107 times, last viewed: 2016-10-22 20:49:52 PDT (-0700)
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