Observation 214788: Lecanora rubicunda Bagl.

When: 2015-08-24

Collection location: Planalto das Cezaredas, Portugal [Click for map]

Who: zaca

No specimen available

Growing on the bark of an oak tree.
It seems that this species is very widespread here. I found it several times this year at different locations. Its distinguish feature is the chemistry, with a big concentraion of norstitic acid, causing the formation of big needle red crystals. This time I have analyzed this feature in more detail and attach the corresponding photos.


Microscopy: Close up of the section at the final stage of the K reaction.
Microscopy: Sections;
Microscopy – Development of the K reaction: 1- Section in water; 2- inserting a drop of K gives an intense yellow efflux; 3- evolution to a red reaction still with some yellowish tones, starting the formation of red crystals; 4 – Final stage, only red is visible and a the red crystals a...
Microscopy: Section in the final stage of the K reaction;

Proposed Names

87% (1)
Eye3 Eyes3
Based on microscopic features
Based on chemical features: K+ yellow to red with the formation of red needle crystals.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2015-08-30 14:18:11 CDT (-0500)
Last modified: 2015-08-30 14:18:24 CDT (-0500)
Viewed: 8 times, last viewed: 2018-01-31 22:27:31 CST (-0600)
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