Irish lichens

Lecanora intumescens

Order: Lecanorales       Family: Lecanoraceae

Species: Lecanora intumescens

Growth type crustose
Photos: Foynes and Kilcolman, Co. Limerick, Ireland

Whitish to pale grey thallus, sometimes with black prothallus. Apothecia reddish brown with swollen margins that become undulate and distorted and appear slightly powdery because of protruding hyphae (cortex is lacking). Margins contain small crystals and the epithecium has coarse yellow granules. Older apothecia become much larger in size. Spores 11.5-18 x 5-8 µm. Micrographs below.

Widespread but scarce on smooth-barked deciduous trees. Chemistry: Thallus K+ yellw, C-. Exciple PD+ deep yellow or orange, UV+ pale orange or yellow

Similar: L. argentata. Crystals in margins, no granules in epithecium


Lecanora intumescens

Lecanora intumescens

Lecanora intumescens

Lecanora intumescens

Micrographs
Lecanora intumescens

Lecanora intumescens
Lecanora intumescens. September 2010, August 2024

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