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Rinodina sophodes (Ach.) A.Massal.


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); Wirth, Hauck & Schulz (2013), 2: 1007, 1021 (photo); Nordic Lichen Flora (2002) 2: 65, 108 (photo).

FGBI: http://fungi.myspecies.info/all-fungi/rinodina-sophodes

 
Rinodina sophodes
On Ash (Fraxinus excelsior) twig, Finlaystone Estate, Renfrewshire, February 2011, damp material with apothecial margins green.
 
Rinodina sophodes, hymenium
Rinodina sophodes, ascospores
Rinodina sophodes, Finlaystone Estate, Renfrewshire, February 2011, photomicrographs: hymenium & ascospores


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Uploaded September 2011, updated January 2016