Phylum: Basidiomycota Family: Incertae Sedis
Chlorociboria aeruginascens (Nyl.) Kanouse ex C.S. Ramamurthi, Korf & L.R. Batra
The green staining, caused by the mycelium, is a common feature on dead wood of many deciduous species. The fruiting-bodies are much scarcer.
Apart from one, possibly dubious, record, this is new to the Outer Hebrides