Brown Stew Fungus?

Description:

Galerina marginata or kuehneromyces mutabilis? Growing in deciduous woodland on stump of blackthorn (see 6th picture)? Four other stumps within 40m had similar looking fungi growing on them but the similarity between G. marginata and K. mutabilis is surprising. G. marginata is deadly whilst K. mutabilis is edible. See links for ways to differentiate between species macroscopically

Notes:

ad1. Wikipedia says: The spores measure 8–10 by 5–6 µm, and are slightly inequilateral in profile view, and egg-shaped in face view. Like all Galerina species, the spores have a plage, which has been described as resembling "a slightly wrinkled plastic shrink-wrap covering over the distal end of the spore".[20] The spore surface is warty and full of wrinkles, with a smooth depression where the spore was once attached via the sterigmatum to the basidium (the spore-bearing cell).