Irish lichens

Porpidia tuberculosa
Order: Lecanorales       Family: Porpidiaceae

Species: Porpidia tuberculosa

Growth type crustose.
Photos: On acid rock. Ballingeary and Gougane Barra, Cork, Ireland

Very variable. Whitish to blue-grey or greenish-blue, irregularly cracked, +/- smooth thallus, sometimes tinged orange-red. When present narrow prothallus is black or brown. Scattered or crowded pale grey or greyish-blue soralia, occasional black apothecia.
Chemical reactions negative.

Common on hard siliceous rocks, pebbles, walls and memorials, rare on worked timber.

Similar: Porpidia soredizodes . Soredia K+ yellow, C-, P+ orange


Porpidia tuberculosa


Porpidia tuberculosa


Porpidia tuberculosa


Porpidia tuberculosa
Porpidia tuberculosa. March and August 2009

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