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 Ám. 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

All images used are copyright. Please contact me if you find errors.