Observation 276675: Protoparmelia M. Choisy

When: 2017-04-29

Collection location: Serra de São Mamede, Portugal [Click for map]

Who: zaca

No specimen available

Growing on siliceous rock.


Microscopy: Asci (x1000, in phloxine);
Microscopy: Apothecial section (x100, in water);
Microscopy: hymenium (x400, in phloxine);
Microscopy: Paraphyses (x1000, in phloxine);
Microscopy: Asci staning in lugol (x1000, in phloxine).

Proposed Names

29% (1)
Recognized by sight
87% (1)
Recognized by sight: Cf. Observation 273000.
Based on microscopic features

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= Observer’s choice
= Current consensus


Add Comment
Microscopy added. Protoparmelia confirmed.
By: zaca
2017-05-17 19:58:14 EDT (-0400)

One of the main features of this specimen is the almost complete absence of thallus (similarly to the one in observation 273000, collected at another place of this big location, meaning that it can be spreaded here), so that only the red-brown (bordeaux or wine colored) apothecia are visible. These are lecanorine with a white margin, excluded in the most mature. It seems that the younger ones are light orangish colored, since there are few scatered by the rock.
This time the microscopy worked much better than with the previous specimen. The section is similar to other specimens in this genus. The spores are similar in form to those described for Protoparmelia montagnei, i.e. ellipsoidal with rounded ends, but the dimensions do not coincide, the lenght is similar but these are wider than in that species; I got the following dimensions (most of the spores were measured inside the asci, due to the absence of free spores):
(10.1) 10.5 – 13 (13.8) × (3.6) 4 – 5 (5.1) µm
Q = (2.1) 2.4 – 3.1 (3.2) ; N = 25
Me = 11.9 × 4.3 µm ; Qe = 2.7 .
The dimensions given in the British Flora for P. montagnei are: 9-13 × 2-3.5(-4.4).

Created: 2017-05-16 10:20:45 EDT (-0400)
Last modified: 2017-05-17 19:59:39 EDT (-0400)
Viewed: 41 times, last viewed: 2019-08-12 18:06:48 EDT (-0400)
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