Parmeliaceae Xanthoparmelia pulla Growth type foliose Medulla K-, C+ pinkish-red, KC+ pinkish-red, P-, UV+ white. Chemical reactions can be variable. Usually coastal on well-lit siliceous rocks above HWM but also found inland Large grey-brown to dark-brown thallus with +/- adpressed lobes not widening at apices, faintly reticulate. Underside black with sparse rhizines, tan towards edges. Dark-brown apothecia are usually present, the entire margins becoming thin and distorted. Isidia are absent. Spores are simple, 5.5-14 x 3.5-8 µm. Microscope photographs below. Similar: X. loxodes. KC+ orange-red. Lobes isidiate, lower surfaces black

Microscope photographs




Xanthoparmelia pulla
On slate roof, Wimborne, Dorset. November 2014