Mycena seynii …
M. seynii (seynesii) is a rarely recorded, small to medium sized, chestnut-brown to purplish-brown Mycena. It is found either solitary or in small clusters on the cones of Pinus species. The example shown, one of several specimens discovered, was found and photographed in West Sussex on the decaying cones of Pinus radiata.
References:
Aronsen, A. and Læssøe, T. (2016). The genus Mycena: Fungi of Northern Europe, Vol. 5, pp. 154-155. Danish Mycological Society.
Buczacki, S., Shields, C. and Ovenden, D. (2012). Collins Fungi Guide: The most complete field guide to the mushrooms and toadstools of Britain & Ireland. London: HarperCollins, p. 218, fig. p. 219.
http://www.mycobank.org/MB/272067
https://species.nbnatlas.org/species/BMSSYS0000048231
http://www.speciesfungorum.org/Names/NamesRecord.asp?RecordID=272067
