Lyophyllum caerulescens
Stem distinctly tapering towards base. Cap 40-100 mm, convex to bell-shaped, later expanded
to depressed, smooth, shiny, ochraceous to yellowish brown or greyish brown, often
with darker centre, slightly hygrophanous, not translucently striate; gills adnate, distant,
whitish to pale grey, turning bluish, later blackish when bruised; stem 25-80 x 5-15 mm,
often compressed, pruinose, becoming smooth, whitish to pale grey; smell strongly rancid;
taste mild.