Observation 88869: Caloplaca Th. Fr.

When: 2012-02-04

Collection location: Planalto das Cezaredas, Portugal [Click for map]

Who: zaca

No specimen available

Brighter than usual.

Proposed Names

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

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks, Jason, for the explanation.
By: zaca
2012-03-11 17:54:48 CDT (-0500)
Two types of rims to watch for Caloplaca
By: Jason Hollinger (jason)
2012-03-11 15:02:56 CDT (-0500)

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 06:56:33 CDT (-0500)

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)
2012-03-09 00:47:45 CST (-0600)

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 14:02:34 CST (-0600)
Last modified: 2012-03-11 06:57:59 CDT (-0500)
Viewed: 60 times, last viewed: 2017-06-10 10:20:42 CDT (-0500)
Show Log