Thelotremataceae Diploschistes gypsaceus Growth type crustose Chemical results: K-, C+ red, P-, UV- BLS conservation evaluation: LC NS Very scattered distribution on shaded, vertical calcareous rocks, most frequently found on limestone. The thick, very pruinose, pale-greyish to white thallus is cracked or areolate and surrounded by a white prothallus. Apothecia are frequent, concave and initially immersed, the discs mid to dark grey and strongly pruinose. Asci are 4-spored, spores 25-40 x 10-17 µm, muriform with 4-7 transverse and 1-2 longitudinal septa and dark-grey or brown when mature.

Diploschistes gypsaceus
On limestone, Portland, Dorset. February 2016