Porpidia something-or-other

Porpidia something-or-other

Observation - Porpidia something-or-other - UK and Ireland. Description: On siliceous rock. Apothecia sessile, epruinose, to about 2mm; K+ yellow (indistinct); asci 8-spored; ascospores simple, colourless, ellipsoid-acuminate, 18-21 x 8-10µm; paraphyses branched and anastomosing. Thallus presumably coloured by iron oxide (spor

On siliceous rock. Apothecia sessile, epruinose, to about 2mm; K+ yellow (indistinct); asci 8-spored; ascospores simple, colourless, ellipsoid-acuminate, 18-21 x 8-10µm; paraphyses branched and anastomosing. Thallus presumably coloured by iron oxide (spores rule out P. flavicunda/flavocruenta).