Are they growing on old roots or wood?
Think they maybe "Spindle Toughshank" Mate see what you think in the link.
Spindle Toughshank
WWW.WILDFOODUK.COM
Spindle toughshank, Spindleshank, Gymnopus fusipes, Collybia fusipes, Basidiomycetes, wood inhabiting, Saprotrophic, root rot
Cheers Arry