Irish lichens

Bacidia arceutina

Order: Lecanorales       Family: Ramalinaceae

Bacidia arceutina

Growth type crustose
Photos: On Ash. Co. Cork, SW Ireland.

The small patches of smooth, slightly warted or +/- immersed thallus can be grey, grey-green or whitish. Small pale brown or brownish-black apothecia (0.2-0.6 mm), initially flat but becoming convex with age and excluding the thin margins. The spores are multi-septate, 35-55(-67) x 1.5-2(-2.5) Ám. Hymenium colourless. Micro photos below. Chemical reactions and UV negative

Found on the trunks, branches and twigs of nutrient-rich, basic-barked shrubs and trees, also sometimes on rocks and over moss.

Similar: The apothecia of other Bacidea species contain green or purple pigments. Lecidea erythrophaea has simple spores.


Bacidia arceutina


Bacidia arceutina

Microscope photographs
Bacidia arceutina


Bacidia arceutina
Bacidia arceutina January and April 2012

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