Protoblastenia rupestris Psoraceae

Protoblastenia rupestris

Growth type crustose
Chemical results: Apothecia K+ crimson
Important indicator species of calcareous substrata. Common on mortar, limestone, cement and concrete.

The grey, greyish-brown or green-grey thallus can be either scurfy, cracked or +/- absent. The dull-orange apothecia are not in pits and become +/- convex and distorted. Ascus 8-spored with ellipsoid spores, 8-17 x 5-8 Ám.

Similar: Protoblastenia calva, P. incrustans and P. lilacina


Protoblastenia rupestris


Protoblastenia rupestris


Protoblastenia rupestris
Protoblastenia rupestris
On concrete, Dorset. February 2014

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