Multi-access version: http://www.xper3.com/xper3GeneratedFiles/publish/identification/-8020138811190523298/mkey.html

1 {Shape of spores_2} :
                  {mostly ovoid to ellipsoid} => 2
                  {mostly fusiform} => 3
                  {mostly obclavate} => 4
                  {mostly ellipsoid} => Colletotrichum
                  {mostly falcate} => 5
                  {mostly globose} => 6
                  {variable in shape} => 7
                  {mostly filiform} => 8
                  {mostly cylindrical} => Hormographiella
                  {mostly long ellipsoid} => Pseudopithomyces

2 {Spores were produced inside some kind of enclosing structure (e.g. pycnidia ascomata)} :
                  {No} => 9
                  {Yes} => 10

3 {Max. length of spores} :
                  {<10 µm} => 11
                  {>30 µm} => 12
                  {10–20 µm} => 13
                  {20–30 µm} => 14

4 {Color of spores} :
                  {hyaline or subhyaline} => 15
                  {pigmented} => 16

5 {Septa of conidia} :
                  {0} => 17
                  {>4} => Fusarium (Macroconidia)

6 {Max. length of spores} :
                  {<10 µm} => 18
                  {>30 µm} => Tilletia
                  {10–20 µm} => 19
                  {20–30 µm} => Tilletia

7 {Dispersal of conidia} :
                  {wet or slimy} => Hormographiella
                  {dry} => Cladosporium

8 {Spores were produced inside some kind of enclosing structure (e.g. pycnidia ascomata)} :
                  {No} => Tilletia
                  {Yes} => 20

9 {Dispersal of conidia} :
                  {wet or slimy} => Bionectria, Achroiostachys, Fusarium (Microconidia), Sarocladium
                  {dry} => Daldinia, Hypoxylon, Nemania, Myrmecridium, Xylaria

10 {Color of spores} :
                  {hyaline or subhyaline} => 21
                  {pigmented} => 22

11 {Spores were produced inside some kind of enclosing structure (e.g. pycnidia ascomata)} :
                  {No} => Albifimbria, Microdochium
                  {Yes} => Diaporthe

12 {Septa of conidia} :
                  {>4} => Bipolaris, Exserohilum, Phaeotrichoconis
                  {1–4} => 23

13 {Color of spores} :
                  {hyaline or subhyaline} => 24
                  {pigmented} => 25

14 {Dispersal of conidia} :
                  {wet or slimy} => 26
                  {dry} => 27

15 {Max. length of spores} :
                  {<10 µm} => Phanerodontia
                  {>30 µm} => Trichoconiella

16 {Shape of spores_1} :
                  {Curved} => Bipolaris, Exserohilum
                  {Not curved} => Alternaria, Corynespora, Exserohilum, Stemphylium

17 {Erect conidiophores} :
                  {Present} => Creosphaeria
                  {Absent} => Colletotrichum (truncatum)

18 {Dispersal of conidia} :
                  {wet or slimy} => 28
                  {dry} => Aspergillus, Penicillium, Microascus (conidia), Rhizopus

19 {Erect conidiophores} :
                  {Present} => 29
                  {Absent} => Corynascus (conidia)

20 {Septa of conidia} :
                  {0} => Diaporthe
                  {1–4} => Gaeumannomyces

21 {Max. length of spores} :
                  {<10 µm} => Epicoccum, Preussia (conidia), Pyrenochaetopsis, Setophoma
                  {20–30 µm} => Lasiodiplodia

22 {Max. length of spores} :
                  {<10 µm} => Coniochaeta (ascospores), Microascus (ascospores)
                  {20–30 µm} => Lasiodiplodia

23 {Dispersal of conidia} :
                  {wet or slimy} => Pestalotiopsis
                  {dry} => Curvularia

24 {Spores were produced inside some kind of enclosing structure (e.g. pycnidia ascomata)} :
                  {No} => Microdochium
                  {Yes} => 30

25 {Septa of conidia} :
                  {0} => Chaetomium, Corynascus (ascospores), Preussia (ascospores)
                  {1–4} => Phaeosphaeria, Preussia (ascospores)

26 {Septa of conidia} :
                  {0} => Diaporthe
                  {1–4} => Pestalotiopsis, Pseudopestalotiopsis

27 {Color of spores} :
                  {hyaline or subhyaline} => Magnaporthe
                  {pigmented} => Curvularia

28 {Erect conidiophores} :
                  {Present} => Trichoderma
                  {Absent} => Coniochaeta (conidia)

29 {Color of spores} :
                  {hyaline or subhyaline} => Oedocephalum
                  {pigmented} => Nigrospora

30 {Septa of conidia} :
                  {0} => Diaporthe
                  {1–4} => Phaeosphaeria