Thursday 7 May 2015

Acarospora fuscata

A distinctive lichen in the field and under the microscope too. The asci contain 200 or so spores. Narrowing down to species level however was more difficult. This one was on siliceous rock (carboniferous granite). I went for A.impressula because of the C- reaction but the areole size and lack of records for the site forced me to go with A.fuscata in the end.

Acarospora fuscata ascus

Acarospora fuscata

Acarospora fuscata

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