Parmeliaceae Xanthoparmelia verruculifera Growth type foliose Chemistry: Medulla: K-, C+/- pink-red, KC+/- pink, UV+ white Coastal and inland distribution on well-lit, siliceous rocks and horizontal surfaces. Dull brown to dark blackish-brown lobes with coarse, clumped isidia that can form large, +/- contiguous patches. Underside of lobes black with simple rhizines. Apothecia with isidiate margins. Similar: Xanthoparmelia delisei and Xanthoparmelia loxodes. Melanelixia fuliginosa. Shiny lobes, thinner isidia and different chemistry

Xanthoparmelia verruculifera
Bird hide roof, Studland Heath, Dorset. October 2013