Pertusaria pertusa Pertusariaceae

Pertusaria pertusa

Growth type crustose.
Chemical results: K+ yellow, C-, KC+ yellow, P+ deep orange, UV+/- orange.
Very common on tree bark, occasional on rocks, walls and memorials.

A conspicuous zoned margin surrounds the thick, slightly cracked greenish-grey thallus. Wart-like protuberances produce 3-7 apothecia with discs like tiny black pits. Asci usually 2-spored, spores 150-250 x 40-80 Ám. Microscope photographs below.
Sometimes host to Sphinctrina turbinata

Similar: Pertusaria hymenea. Discs are +/- open, asci 8-spored


Pertusaria pertusa

Pertusaria pertusa

Microscope photograph
Pertusaria pertusa

Pertusaria pertusa
Pertusaria pertusa

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