Observation 213450: Buellia disciformis (Fr.) Mudd
When: 2015-08-15
Who: zaca
No herbarium specimen

Notes: This observation refers to the lichen with whitish thallus at the center of the first photo, close to another Lecidella (?) with light brown thallus, growing on bark.

Images

551394
Microscopy: Section;
548892
548893
Patchwork of Buellia, Lecidella and Lecanora spp..
551395
Microscopy: Hymenium (close up):
551396
Microscopy: Asci and spores.

Proposed Names

-58% (1)
Recognized by sight
86% (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
2015-08-29 10:31:35 UTC (+0000)

As it happened before I misinterpreted a Buellia by a Lecidella. In fact, I thought that there were two Lecidella spp. growing together. As in the case of my observation 210179, the one with white thallus revelead to be Buellia disciformis. The following features were used to achive the species using the key to Amandinea and Buellia in the British Flora:

- Thallus not immersed in lichens or on crustose lichens;
- Thallus without soredia;
- On bark;
- Hymenium with numerous oil droplets; ascospores wall thinner and paler at apices;
- Ascospores dimensions:
(16.8) 18.1 – 23.4 (25.5) x (7.4) 8.1 – 10.8 (11.4) um
Q = (1.9) 2 – 2.7 (3.3) ; N = 28; Me = 21.2 × 9.1 um ; Qe = 2.4.

Created: 2015-08-21 16:50:17 UTC (+0000)
Last modified: 2015-08-29 10:32:45 UTC (+0000)
Viewed: 24 times, last viewed: 2016-04-28 13:12:35 UTC (+0000)
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