Irish lichens

Pertusaria coccodes

Order: Pertusariales       Family: Pertusariaceae

Species: Pertusaria coccodes

Growth type crustose.
Photos: On Rowan. Macroom, Co. Cork, SW Ireland.

Greenish or brownish-grey thallus often with pale brown or whitish prothallus. Thallus +/- covered by conspicuous coarse, smooth, globose or ovoid-elongate isidia, often brown-tipped. Apothecia are very rare, with punctiform discs in smooth globular warts.

Usually on +/- well-lit, nutrient-rich bark of deciduous trees, occasional on smooth, siliceous rocks overhung by trees.
Thallus K+ yellow turning red, C-, KC-, P+ orange, UV-

Similar: Pertusaria pseudocorallina. Occurs on rocks.

Pertusaria coccodes

Pertusaria coccodes

Pertusaria coccodes
Pertusaria coccodes January and May 2010

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