Irish lichens

Caloplaca cerina, wet

Order: Teloschistales       Family: Teloschistaceae

Species: Caloplaca cerina

Growth type crustose.
Photos: On Wych Elm. Bantry, Co. Cork, SW Ireland.
Identification confirmed by John Douglass

Thin or areolate light-grey thallus with large (to 2mm) apothecia, discs orange-yellow with thick, +/- crenulate, greyish margins.
Ascus 8-spored, spores polarilocular, 12-15 x 8-10 Ám, septum 5-8 Ám wide 1/3 - 1/2 length of spore. Micro photos below.
Apothecia K+ red-purple

Occurs on both twigs and branches of basic-barked shrubs and trees like Elder, Ash and Sycamore.

Similar: C. cerinella. Smaller apothecia, asci 12-16 spored

Caloplaca cerina

Caloplaca cerina, wet

Micro photographs
Caloplaca cerina, microscope photograph

Caloplaca cerina, microscope photograph
Caloplaca cerina January 2011

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