Observation 213221: Pertusaria multipuncta (Turner) Nyl.

When: 2015-08-15

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

Who: zaca

No specimen available

The genus Pertusaria is very well represented at this location, either those species growing on rock as well as the epiphytic species. I think that this observation shows one of the epiphytic that I never saw: Pertusaria multipuncta. It is very similar to P. albescens and the specimen shown here grew together with one of P. albescens. As can be seen they are very similar and only the chemistry permits to separate them: C-, K- and KC- for P. albescens and C-, K+ yellow, KC+ yellow. It seems that the soralia, which remain like that in P. albescens, give rise to apothecia in the case of P. multipuncta. It happens that in this case the specimen of P. albescens almost lacks soralia. I can’t distinguish between soralia and apothecia not even magnifying the photos.


Microscopy: Spore in formation inside the ascus;
Microscopy: Sections;
Microscopy: Hymenium (general view);
Microscopy: Hymenium (general view); Note the big spores inside the asci ( 1 per ascus);
Microscopy: Young asci;
Microscopy: A (free) spore;
Microscopy: Spore inside the ascus, in initail stage of formation;
Microscopy: Spores in formation inside the asci;

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Microscopy added.
By: zaca
2015-08-25 22:05:53 SAST (+0200)

Spores (only two free observed and several still inside the asci) with average dimensions ~220 × 55 um. This is somewhat bigger than the indicated in the British Flora for Pertusaria multipuncta, but there is no other species with similar features. Therefore, I’m very confident about the species, though it is my first observation of it.

Created: 2015-08-18 23:36:40 SAST (+0200)
Last modified: 2015-08-25 22:01:03 SAST (+0200)
Viewed: 31 times, last viewed: 2017-06-20 20:55:49 SAST (+0200)
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