1	Basidiomata medium. Pileus more or less brown, strongly hygrophanous. Stipe usually cylindrical. Universal veil sparse. With positive yellow UV reaction. Associated with coniferous and/or broadleaf trees. Spores ellipsoid to amygdaloid	(section Colymbadini) 2
–	Basidiomata medium to large. Pileus more or less brown and hygrophanous. Stipe cylindrical to clavate. Universal veil white to greyish-yellow, sometimes with violet tinge, usually forming a ring at the middle stipe. Associated with coniferous and/or broadleaf trees	(section Telamonia) 3
–	Basidiomata medium to large. Pileus brown and weakly hygrophanous. Stipe clavate to slightly bulbous. Universal veil greyish-brown to blackish-brown. Associated with coniferous trees. Spores subglobose to ellipsoid, moderately to strongly verrucose	(section Fuscoperonati) 4
2	Pileus strongly hygrophanous, reddish-brown to dark brown, surface translucently striate. Lamellae distant, Laccaria-like when young. Stipe cylindrical to tapering towards base, hollow. Universal veil white, extremely sparse. Odour indistinct. Positively yellow UV fluorescence (exsiccata). Associated with broadleaf trees. Spores ellipsoid to amygdaloid, on average 8.0–8.5 × 4.8–5.2 μm.	C. laccariphyllus
–	Pileus strongly hygrophanous, yellowish-brown to brown, margin striate. Lamellae medium-spaced. Stipe cylindrical to tapering towards base, not hollow. Universal veil yellow, very sparse. Odour similar to raw vegetables. Usually yellow UV fluorescence at stipe. Associated with broadleaf trees. Spores amygdaloid to narrowly amygdaloid, on average 7.8–8.1 × 4.6–4.7 μm	C. uraceomajalis
–	Pileus strongly hygrophanous, dark greyish-brown to dark brown, margin slightly striate. Lamellae medium-spaced to fairly distant, margin whitish when young. Stipe cylindrical to clavate, sometimes tapering downwards, sometimes hollow. Universal veil yellow. Strong yellow UV fluorescence at stipe, dull yellowish-brown at pileus, lamellae and context. Associated with coniferous and broadleaf trees. Spores amygdaloid to weakly ellipsoid, on average 8.1–8.6 × 4.8–5.1 μm	C. nolaneiformis
3	Pileus pale greyish-yellow, paler at the margin, weakly hygrophanous. Lamellae emarginate, medium-spaced, greyish-red when young, sometimes with violet tinge. Stipe cylindrical to somewhat tapering towards base, pale greyish-yellow. Odour indistinct. Spores ellipsoid, on average 9.0–9.9 × 6.1–6.5 μm	C. neotorvus
–	Pileus greyish-brown to chestnut brown, usually with violet tinge at the margin, weakly hygrophanous. Lamellae adnate, subdecurrent to distant, greyish-brown, with violet tinge. Stipe clavate, usually bulb at the base. Odour acidulous. Spores ellipsoid, 8–10.5 × 6–7 μm	C. torvus
4	Pileus pale greyish-brown, sometimes reddish-brown to dark brown, margin wavy with age, with greyish-brown fibrillose. Stipe clavate. Spores subglobose to broadly ellipsoid, on average 10.3–11.2 × 8.0–8.6 μm	C. subfuscoperonatus
–	Pileus chocolate brown to blackish-brown, pale greyish-brown at the edge, fine fibrous to fine scaly. Stipe clavate, with a bulb at the base. Spores ellipsoid to broadly ellipsoid, 9.7–11.6 × 6.6–7.7 μm	C. fuscoperonatus