Irish lichens

Lecanora horiza

Order: Lecanorales       Family: Lecanoraceae

Species: Lecanora horiza

Growth type crustose.
Photos: Rock Island, Co. Cork, SW Ireland.
Chemical results: K+/- pale yellow, C-. UV+ pale orange

Slightly lumpy or irregularly warted whitish thallus with prominent large, glossy, chestnut-brown apothecia that are often very crowded. The epithecium has an upper layer of fine granules that do not dissolve in K. Spores 9-15 x 6-8.5 Ám. Micrograph below.

Found on rocks, the vertical side of limestone gravestones and memorials and on basic-barked trees

When corticolous can be confused with Lecanora chlarotera, saxicolous specimens with Lecanora campestris


Lecanora horiza

Lecanora horiza

Microscope photograph
Lecanora horiza
Lecanora horiza January 2012

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