Rinodina sophodes (images of British lichens)

Thallus usually in tiny patches, pale greyish to olive brown; apothecia usually densely clustered, margins thick, conspicuous, pale grey (greener when damp), discs dark brown to black; ascospores with relatively thin walls and rounded lumina. Easily overlooked due to its small size, on smooth, nutrient-rich twigs, especially Ash (Fraxinus excelsior), widespread but much more frequent in the north and west.

Refs: Smith et al. (2009), 824; Purvis et al. (1992), 552; Dobson (2005), 396 (line drawing of spore), 397; Dobson (2011), 400 (line drawing of spore), 401; Puntillo (1996), plate 36 (photo); Valcárcel et al. (2003), 344-5 (photo); Nordic Lichen Flora (2002) 2: 65, 108 (photo).

lastdragon.org

Images of British Lichens