1. Asci 8-spored	Pse. decidua
1. Asci more than 8-spored	2
2. Asci 1024-2048-spored, ascospores with upper cell up to 14 μm and lower cell up to 4 μm	Pse. prolifica
2. Asci 256- or 512-spored, ascospores with upper and lower cell longer than 14 and 4 μm, respectively	3
3. Asci about 256-spored, ascospores with upper cell up to 16 μm long and lower cell up to 9 μm	Pse. curvicolla
3. Asci about 512-spored, ascospores with upper cell up to 22 μm and lower cell up to 8 μm	Pse. longicollis