Observation 77854: Lecanora albella (Pers.) Ach.
When: 2011-10-02
Who: zaca
No herbarium specimen

Proposed Names

58% (1)
Eye3 Eyes3
Used references: CNALH.
Based on microscopic features
Based on chemical features

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Thanks!
By: Jason Hollinger (jason)
2011-10-04 00:24:04 PDT (-0700)

We’re using the exact same information! I hope we’re right. :)

Quoting CNALH:
By: zaca
2011-10-03 13:35:46 PDT (-0700)

- “Lecanora albella is readily distinguished by its heavily pruinose apothecial disc, relatively small apothecia with thin margins, and the presence of protocetraric acid”.
- Chemically, the two species [L. albella and L. caesiorubella_] are indistinguishable, but L. caesiorubella generally has larger apothecia and a thicker pseudocortex.

So, my proposal of classification was based on the following: My specimen satisfy the conditions of the first item above and the apothecia are very smal with thin and not flexous margins. Therefore, I chose L. albella.

Let me add that this specimen did not react K+y to r and it remains on K+y. But, this was mentioned in CNALH to be possible for the chemical reactions.

I was just looking at this
By: Jason Hollinger (jason)
2011-10-03 09:47:42 PDT (-0700)

I wasn’t confident of distinguishing L. albella from L. caesiorubella. Do you mind sharing your reasoning?

(I, too, concluded mine was L. albella based on apothecia mostly < 1 mm (only one as large as 1.5 mm) and thin rims with cortex ~50 μm. But in my case, in the Santa Monica Mountains of southern California, only L. caesiorubella_ has been reported and is far more common in the general area, making me second-guess myself. I had to double check the chemistry to verify KC+ rose – most noticeable on the apothecia if I was quick to apply the C before the K+ yellow turns to red.)

Created: 2011-10-02 16:04:33 PDT (-0700)
Last modified: 2011-10-02 16:04:37 PDT (-0700)
Viewed: 64 times, last viewed: 2016-03-30 21:27:45 PDT (-0700)
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