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When: 2012-07-28

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

Who: zaca

No specimen available

Notes:
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.

Images

Chemical reactions;
Microscopy.

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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