Irish lichens

Caloplaca flavovirescens
Order: Teloschistales       Family: Teloschistaceae

Species: Gyalolechia flavovirescens (Caloplaca flavovirescens)

Growth type crustose.
Photos: On path and urban wall. Co. Cork, SW Ireland.
Specimen immediately below identified by John Douglass

Large greenish-yellow to orange angular-areolate thallus surrounded by pale prothallus. Frequent brownish-orange apothecia with paler margins. spores 15-20 x 5-10 Ám with a wide septum. Often occurs as isolated specimens. K+ crimson / purple.

Saxicolous, usually on man-made substrates and calcareous rocks. Also frequent on sea-shores and on acidic rocks affected by more basic downwash.

Caloplaca flavovirescens

Caloplaca flavovirescens

Caloplaca flavovirescens. July and August 2009

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