Poisonous: Inocybe sp., Clitocybe dealbata. Also, Panaeolus campanulatus, foenisecii.
Not edible: Agrocybe dura & pediades, Tubaria furfuracea

Good: Marasmius oreades; Psathyrella candolleana

Inocybe is mycorrhizal with oak, Psathyrella grows on woody debris, Panaeolus campanulatus grows on manure.

 
 

Inocybe species	Clitocybe dealbata

 
 

Marasmius oreades	Panaeolina foenisecii
Panaeolus campanulatus	Psathyrella candolleana
Agrocybe dura	Agrocybe pediades
Tubaria furfuracea