Observation 98761: Xanthoria ucrainica S.Y. Kondr.
When: 2012-06-30
No herbarium specimen

Proposed Names

-31% (2)
Eye3
Recognized by sight
56% (1)
Eyes3
Used references: British Flora

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Oh damn!
By: Jason Hollinger (jason)
2012-07-01 15:00:31 CST (+0800)

Sorry, my earlier comment applies to the second photo only: image 232497

The first photo (image 232496) looks to be Candelariella coralliza. See this photo on Stridval.

Definitely Xanthoria s. lato.
By: Jason Hollinger (jason)
2012-07-01 14:56:11 CST (+0800)

This is a remarkably difficult genus. Andrew K. and I have been struggling with the species in the Great Lakes region, too. There are three real options here, according to the British Flora and my own limited experience:

X. candelaria
X. fulva
X. ucrainica (I’d never heard of this before!)

X. candelaria is common and expected on weathered wood like this, but it should have terete branches maybe widening a bit toward the tips; whereas yours shows clearly flattened lobes.

X. fulva is apparently rare in Britain, and usually is on bark (which matches my limited experience in North America, too). The eastern North American material (now called Xanthomendoza weberi) has distinctly narrower, longer, regularly-branching lobes, very unlike this. I don’t have a good feel for “true” X. fulva yet. Photos on-line are, unfortunately, somewhat unreliable because the taxonomy of this species and X. candelaria have both been very confusing, with lots of incorrect material all over the world being called one or the other.

X. ucrainica is a relatively new species (1997). The photos on lastdragon are very close to your material, and the description — aside from the British Flora’s emphasis on the pale grayish to greenish coloration which yours doesn’t have in the slightest, nor do the photos, for that matter — the description otherwise matches perfectly, too.

Created: 2012-07-01 10:10:25 CST (+0800)
Last modified: 2012-07-01 14:49:17 CST (+0800)
Viewed: 47 times, last viewed: 2016-09-06 02:47:10 CST (+0800)
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