Observation 204088: Rinodina beccariana Bagl.
When: 2015-05-01
Who: zaca
No herbarium specimen

Notes: Growing on siliceous rock.

Images

520836
Another photo of the same specimen;
520102
520108
Microscopy: Sections;
520109
Microscopy: Sections-Close up;
520110
Microscopy: Spores.
520119
Comparison of the spores of the Rinodina species in my MO observations; Includes an observation of Physcia, whose spores maybe relevant for ID purposes; Some Spore-types of Rinodina spp. are also included.
520837
Chemical reactions.

Proposed Names

29% (1)
Recognized by sight
58% (1)
Eye3 Eyes3
Used references: British Flora
Based on microscopic features

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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By: zaca
2015-05-12 15:14:31 CDT (-0400)

The comparative set of photos shows that this specimen, as well as the one in observation 204089, has clearly spores of Pachysporaria-type.
According to the British Flora there are (in Britain and presumably by extension here) 7 species with spores of Pachysporaria-type, namely:
R. aspera [Sorediate]
R. atrocinerea
R. beccariana
R. colobinoides [Sorediate]
R. griseosolarifera [Sorediate]
R. isidioides [Isidiate]
R. roboris [Growing on bark].
Using the feature inside bracket to eliminate the corresponding species, we end up with two possibilities: R. atrocinerea and R. beccariana. Both have similar spores dimensions, but the former reacts C+ red on thallus, which is not the case of my specimen. Therefore, I believe this is R. beccariana.

Microscopy added.
By: zaca
2015-05-09 16:40:35 CDT (-0400)

Spores:
(15.3) 15.9 – 21.7 (23.7) x (9.3) 10.3 – 13.8 (15) µm
Q = (1.3) 1.5 – 1.9 (2) ; N = 44
Me = 19.1 × 11.8 µm ; Qe = 1.6

Created: 2015-05-09 16:07:50 CDT (-0400)
Last modified: 2015-05-12 14:43:59 CDT (-0400)
Viewed: 116 times, last viewed: 2016-12-02 20:21:20 CST (-0500)
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