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When: 2012-07-28

Collection location: Monte de S. Bartolomeu, Nazaré, Portugal [Click for map]

Who: zaca

No specimen available

Specimen growing on exposed rock.
The following features were used to key out this specimen as Buellia leptoclinoides, using the key within British Flora (see the reference):

- Thallus not immersed in lichens or on crustose lichens;
- Thallus without soradia;
- On rock;
- Apothecia supericial at maturity;
- Thallus C-
- Thallus K+ yellow (persistent);
- Hymenium with numerous oil droplets (presumably, at least is not clear);
- Ascospores 14.5-23.5 × 6.5-11.5.

I obtained the following average dimensions for the spores:
Me = 20 × 11.1 µm ; Qe = 1.8 (N=25).
This species is the one with bigger spores among those with the same initial features in the key. Some close species can be separated by chemistry, e.g. B. subdisciformis (K+ yellow to red), B. saxorum (C+ red), B. spuria (K+ yellow-orange). The similar B. leptocline has smaller and narrow spores.
This specimen has a pure grey thallus with a black prothallus whereas in the description of B. leptoclinoides a pale yellow-grey thallus is mentioned and the prothallus is not referred.
Unfortunately I was not able to find photographs of this species.


Chemical reactions;

Proposed Names

58% (1)
Used references: Smith et al., The Lichens of Great Britain and Ireland, The British Lichen Society, 2009.
Based on microscopic features
Based on chemical features

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= Observer’s choice
= Current consensus


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