1	Basidiomata clavarioid	Scytinopogon
–	Basidiomata resupinate or stipitate hydnoid	2
2	Hymenophore poroid	3
–	Hymenophore non-poroid	4
3	Basidiospores smooth	Porpomyces
–	Basidiospores ornamented	Trechispora p.p.
4	Basidiomata brown	Luellia
–	Basidiomata light coloured	5
5	Cystidia present, large and distinct	6
–	Cystidia absent or indistinct	8
6	Cystidia distinctly dextrinoid in Melzer’s reagent	Dextrinocystis
–	Cystidia negative or amyloid in Melzer’s reagent	7
7	Cystidia regularly encrusted with rectangular crystals	Subulicystidium
–	Cystidia usually covered with dendroid hyphae	Tubulicium
8	Generative hyphae with ampullate septa	Trechispora p.p.
–	Generative hyphae without ampullate septa	9
9	Subhymenial hyphae isodiametric	Brevicellicium
–	Subhymenial hyphae not isodiametric	10
10	Hyphal system dimitic; basidia with 4 sterigmata	Fibrodontia
–	Hyphal system monomitic; basidia with 4–8 sterigmata	Sistotremastrum