1	Sori as black crusts on the leaf surface	Orphanomyces
1*	Sori not so	2
2	Sori in female flowers, around aborted nuts; spores single	3
2*	Sori in leaves as long striae between the veins; spores in pairs or in balls	4
3	Spores with a thick-walled equatorial band and two, thin-walled polar areas	Planetella
3*	Spores without an equatorial band	Anthracoidea
4	Spores joined in pairs	Schizonella
4*	Spores in balls; spore balls composed of one to several, pigmented, fertile spores, surrounded by a layer of paler sterile cells	Urocystis