Roccellaceae Sporodophoron cretaceum (Schismatomma cretaceum) Growth type crustose Chemical results: K+ lemon yellow, C-, KC-, P-, UV +/- pale orange-grey Occasional, forming large patches on dry, well-lit, old parkland and wayside trees. BLS conservation evaluation: LC Sc IR Thick white, powdery thallus (scratching orange) covered with white soralia. Apothecia are unknown. Sometimes host to Chaenothecopsis retinens, with red apothecia Similar: S. niveum. Grey thallus, P+ orange-yellow, UV +/- orange-grey

Schismatomma cretaceum
Holton Lee and Badbury Rings, Dorset. March 2013, April 2016