• Protoblastenia incrustans (DC.) J.Steiner
Protoblastenia incrustans
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This crustose lichen occurs on hard limestones in hilly districts. It differs from the common Protoblastenia rupestris in having paler, yellowy-orange discs (to 0.7mm) that are flattened, and sunken into pits in the substrate. The green-brown to orange-grey thallus is faint. It is uncommon except in areas of naturally occurring limestone.

Key characteristics

  • The flattened, rather pale yellow apothecia that are embedded in pits serve to distinguish this species from all other members of the genus Protoblastenia
  • It is a lichen of hard limestones.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Protoblastenia incrustans (DC.) J.Steiner. [In] LichenIreland. Accessed on 2018-07-16.