Porpidia platycarpoides Porpidiaceae
Porpidia platycarpoides

Growth type crustose
Chemical results: Medulla and apothecia margins K+ yellow > red, P+ yellow

Frequently coastal on hard, well-lit siliceous rocks

Pale greyish warted thallus with or without a black prothallus. Large apothecia to 3mm, discs often pruinose, with prominent smooth margins. Spores 15-23 x 7-10 µm. Microscope photograph below.

Similar: Porpidia cinereoatra. Medulla K-, P-. Smaller spores
P. macrocarpa. Medulla and margins of apothecia K+/- yellow, P+/- orange


Porpidia platycarpoides


Porpidia platycarpoides


Porpidia platycarpoides

Microscope photograph
Porpidia platycarpoides
Porpidia platycarpoides
Studland, Dorset. January and March 2013

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