Observation 21545: Xanthoparmelia (Vain.) Hale
When: 2009-05-31
No herbarium specimen

Notes: small thalli on stone wall vertical surface

Proposed Names

-1% (2)
Recognized by sight
28% (1)
Recognized by sight: Shiny like that means parmelioid. Looks a lot like an odd-colored Xanthoparmelia to me. I’m betting that’s reflected light.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Another species
By: Jason Hollinger (jason)
2009-06-08 20:33:20 PDT (-0700)

I think your two new pictures are another species of Xanthoparmelia — the new one has shorter rounder broader lobe tips and appears to be isidiate.

Xanthoparmelia is common on rocks like this
By: Jason Hollinger (jason)
2009-06-02 11:57:25 PDT (-0700)

And it can definitely have very narrow, elongated, overlapping lobes like this. But the genus hasn’t been fully worked out yet. Trevor Goward discovered several new species (in his own back yard practically!) last winter. I know Steven Leavitt at BYU is doing a very extensive study on the genus. But I’m not sure how well-studied the genus is on the southeast — Chris Parrish would know, I’ll bet? At very least, spot tests would be required (drop of lye on the medulla). The chemistry is complicated enough that TLC is generally required to be certain even by the experts. And characteristics of the pycnidia and conidia — ugh!

narrow lobes
By: Vitaly Charny (vcharny)
2009-06-02 11:29:35 PDT (-0700)

When I saw this lichen it remind me Physcia subtilis how it grows. However it has bigger, but still small thalli. On the stone wall with western exposure.

Created: 2009-06-02 09:50:28 PDT (-0700)
Last modified: 2009-06-02 09:50:28 PDT (-0700)
Viewed: 46 times, last viewed: 2016-10-28 00:35:01 PDT (-0700)
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