Irish lichens

Porina chlorotica

Order: Ostropales       Family: Porinaceae

Species: Porina chlorotica

Growth type crustose
Photos: On estuary rocks. Co. Waterford, Ireland.
Identified by John Douglass

Thin dull brown, greenish or blackish thallus. Small perithecia (to 0.3mm), the involucrellum purplish brown. Spores are 3-septate, (12.5-)14.5-18(-32) 3.5-4.5(-6) m. Micrographs below. Chemical results negative. Involucrellum K- or K+ grey-brown

Most frequent on damp, shaded, siliceous rocks, rare on bricks.

Very similar: Porina aenea occurs on shaded bark


Porina chlorotica

Porina chlorotica

Microscope photograph
Porina chlorotica

Porina chlorotica
Porina chlorotica. April 2012

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