Irish lichens

Bacidia rubella

Order: Lecanorales       Family: Ramalinaceae

Species: Bacidia rubella

Growth type crustose.
Photos: On mature Oak. Bantry House, Co. Cork, SW Ireland.

Thallus yellow-green to greyish minutely granular, the granules appearing isidia-like. Sessile apothecia are flat or slightly convex, pale to dark reddish-brown, the margins usually persistent and sometimes pruinose. Spores 3-7(-13) septate, (35-)40-70(-75) 2.5-3(-4) m. Pycnidia pale pink to reddish-brown. Micrograph below. Chemical reactions negative.

On nutrient-rich bark on the trunks of mature trees on rich soils. Rare on sheltered walls and gravestones, absent in polluted areas.

Bacidia rubella

Bacidia rubella

Bacidia rubella
Bacidia rubella November 2009

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