Protoblastenia incrustans Psoraceae
Protoblastenia incrustans

Growth type crustose
Chemical results: Apothecia K+ crimson

Found on natural hard limestone, most frequent in upland areas

Thin pale yellowish-grey thallus, often immersed with small (<0.5mm) pale yellow-orange, flat or slightly convex apothecia in deep pits in substrate. Spores 9-13 x 4-6 Ám. Microscope photographs below.

Similar: P. rupestris. Calcareous substrates and mortar. Larger spores


Protoblastenia incrustans

Protoblastenia incrustans

Microscope photographs
Protoblastenia incrustans

Protoblastenia incrustans
Protoblastenia incrustans
On limestone. Portland and Wool, Dorset. March 2016, 2017

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