Observation 99859: Caloplaca Th. Fr.
When: 2012-07-07
Collection location: Peniche, Portugal [Click for map]
Who: zaca
No herbarium specimen

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Good explanation!
By: zaca
2012-07-10 20:11:20 CEST (+0200)
The white zones may be necrotic
By: Jason Hollinger (jason)
2012-07-10 20:05:12 CEST (+0200)

The anthraquinones may have leeched out completely. I looked up sorediate/isidiate species in the British Flora, but none are even close. The “soralia” look more like something is eating it. Taken together with the vast dead zone in the center, and the apparent lack of any actual soredia (just excavations which may have given rise to soredia at some point in the past), I conclude that it is damaged, not actually sterile/sorediate.

I defer to your opinion between C. aurantia and C. flavescens (and _C. saxicola? others?) I’m just commenting on the odd appearance of the thallus, suggesting this is probably due to damage not morphology.

So, is not only damage,
By: zaca
2012-07-10 19:58:11 CEST (+0200)

but also with a strange chemistry. Did you notice that the K+ red reaction only appears in the yellow zone. From my experience C. aurantia has more flat lobes at margin.

I think this is damaged not sorediate
By: Jason Hollinger (jason)
2012-07-10 08:32:23 CEST (+0200)

Like maybe C. aurantia. Is that what you were thinking, too?

Created: 2012-07-09 21:14:27 CEST (+0200)
Last modified: 2012-07-09 21:14:28 CEST (+0200)
Viewed: 75 times, last viewed: 2016-10-27 03:37:29 CEST (+0200)
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