Irish lichens

Lecidea lithophila
Order: Lecanorales       Family: Lecideaceae

Species: Lecidea lithophila

Growth type crustose.
Photos: On upland rock. Gougane Barra, Cork, SW Ireland.
Left identified by John Douglass

The cracked-areolate thallus is greyish, usually with patches that are stained rusty-red. Large, +/- flat apothecia are dark-brown to black, becoming browner when wet. Asci 8-spored. Spores simple, colourless, 11-15 x 5-6 Ám. Microscope photograph below.

Common in upland areas, often near streams on iron-rich siliceous rocks. Chemical reactions negative.

Similar: Tremolechia atrata and Rhizocarpon oederi

Lecidea lithophila

Lecidea lithophila

Lecidea lithophila

Microscope photograph Lecidea lithophila, ascus and spores

Lecidea lithophila. August 2009 and January 2012

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