Observation 88869: Caloplaca Th. Fr.
When: 2012-02-04
Who: zaca
No herbarium specimen
0 Sequences

Brighter than usual.

Proposed Names

19% (2)
Recognized by sight
29% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Thanks, Jason, for the explanation.
By: zaca
2012-03-11 15:54:48 PDT (-0700)
Two types of rims to watch for Caloplaca
By: Jason Hollinger (jason)
2012-03-11 13:02:56 PDT (-0700)

I’m just learning about this. There are two types of rims to watch for in Caloplaca: the thalline rim and the “proper exciple”. When the thallus is a different color from the apothecial disk, it is easy to distinguish the two, because the thalline rim (same color as thallus) will be a different color from the proper exciple (similar color to disk). For all-orange Caloplaca, I’m told you need to do a cross-section and check for algae in the rims. The cellular structure of the proper exciple is markedly different from the cellular structure of the thalline rim, too.

The closest …
By: zaca
2012-03-11 04:56:33 PDT (-0700)

is C. cerinella, but I have no sample to confirm. I did not know the color of the rim was distinctive. So I’ll leave it as Caloplaca sp.. Thanks, Jason.

Yellow rims rule out C. cerina
By: Jason Hollinger (jason)
2012-03-08 22:47:45 PST (-0800)

The British Flora gives only lists a few options with white thallus, yellow apothecia, no thalline rim:

C. luteoalba – apothecia start immersed
C. suaedae – thick gray areolate thallus
C. cerinella – 12-16 spores per ascus, apothecia pale yellow
C. cerinelloides – 8 spores per ascus, apothecia pale yellow
C. holocarpa group – 8 spores per ascus, apothecia orange, crowded, angular

Of course, there might be others in Portugal.

Created: 2012-03-08 12:02:34 PST (-0800)
Last modified: 2012-03-11 04:57:59 PDT (-0700)
Viewed: 60 times, last viewed: 2017-06-10 08:20:42 PDT (-0700)
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