Observation 87151: Caloplaca citrina group
When: 2011-10-02
No herbarium specimen

Proposed Names

57% (1)
Recognized by sight
86% (1)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Fair enough
By: Jason Hollinger (jason)
2012-01-31 00:49:18 GMT (+0000)

And if I had a piece of sandstone sitting in front of me (doesn’t everyone??) I would immediately have a intuitive grasp of the scale of your photo! :) Seriously though, I get the idea that whatever the structures your photos vaguely hint at, they are way too small to be Xanthoria fulva.

Rule or not to rule.
By: Andrew Khitsun (Andrew)
2012-01-31 00:44:46 GMT (+0000)

Yes, I didn’t (and still don’t) have a way with a ruler or other tool showing the scale. I have a bunch of little helpers here, though :-) Look for grains of sand on these photos. While grains could be slightly different for different sands, sandstone stands out compared with other rocks when you try to judge the size of the object on the surface of it.

re: X. fulva having developed lobes
By: Jason Hollinger (jason)
2012-01-29 19:36:08 GMT (+0000)

That’s what I’m thinking. It’s a bit hard to get scale off of photos like these sometimes, though!

Caloplaca citrina wins.
By: Andrew Khitsun (Andrew)
2012-01-29 19:15:20 GMT (+0000)

I keep confusing Caloplaca citrina and Candelariella vitellina. As for Xanthoria fulva – would it have more developed lobes?

Something about the color / texture
By: Jason Hollinger (jason)
2012-01-29 19:03:42 GMT (+0000)

Suggests Caloplaca citrina group to me. K test obviously would clinch it. (Do we both agree that this can’t be some sort of dwarf population of Xanthoria fulva?)

Candelariella vitellina?
By: Andrew Khitsun (Andrew)
2012-01-29 17:02:50 GMT (+0000)

This was growing on a sandstone in full sun. Although I can’t see apothecia, this should be C.vitellina.

Created: 2012-01-29 16:59:13 GMT (+0000)
Last modified: 2012-02-07 05:28:04 GMT (+0000)
Viewed: 45 times, last viewed: 2016-10-25 09:35:40 BST (+0100)
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