Irish lichens

Candelariella vitellina
Order: Lecanorales       Family: Candelariaceae

Species: Candelariella vitellina

Growth type crustose.
Photos: On upland and coastal rocks. Co. Cork, SW Ireland.

Variable. Thallus thin or of flattened, mustard-yellow to orange-brownish, irregular granules which can form thick crusts. Soredia and isidia are absent. Apothecia dull yellowish, becoming darker with age. Asci 12-32 spored, the simple spores with oil droplets can appear 1-septate, 9-15 x 3.5-6.5 Ám. Microscope photo below.
Chemical reactions: K- (Caloplaca species are K+ red)

Found on nutrient-rich siliceous rocks, tops of concrete posts and other sites where birds perch. Occasional on slightly calcareous brick or rock.

Candelariella vitellina

Candelariella vitellina

Microscope photograph
Candelariella vitellina, ascus and spores
Candelariella vitellina. December 2008 and March 2012

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