Parmeliaceae Punctelia reddenda Growth type foliose Chemical results: Cortex K+ yellow. Medulla C-. 'Old woodland' indicator usually found on mossy trunks in sheltered, humid woodlands. Also occurs on mossy rocks. Thallus is bluish-grey, grey-green or yellowish-green, lower surface black with brownish margins. Lobes dotted with white pseudocyphellae producing soralia with coarse, granular soredia. Small folioles often present but apothecia and pycnidia are absent in Britain and Ireland. Similar: Punctelia borreri, lobes dark beneath. P. subrudecta, lobes pale beneath. P. jeckeri., lobes pale brown beneath, tips pruinose

Punctelia reddenda
Badbury Rings and Pamphill, Dorset. March 2016, January 2017