1. Conidiophores dark brown; conidia ellipsoidal ……………..…………………..……….…….….. 2
1’. Conidiophores pale brown; conidia obclavate to pyriform …………………………..…….……. 4
2. On Musa or Canna ……..………………………………………………………….…… Neocordana
2’. On Poaceae……………………………………………………………………………………..……. 3
3. Conidiophores flexuous, long, dark brown; conidiogenous cells terminal and intercalary;
conidia pale brown, 2-septate; on Sasa sp. and Phyllostchys bambusoides …… Bambusicularia
3’. Conidiophores solitary, simple, short; conidiogenous cells percurrently rejuvenating;
conidia 1-2-septate; on leaves of Phragmites ……….…………………………….…….. Utrechtiana
4. On Poaceae …………………………………..………………….……………..…………………….. 5
4’. On other monocots ………………..………………………………………………..……..….…….. 6
5. Conidiophores cylindrical, unbranched; conidiogenous cells terminal and intercalary, with
flat denticles with a central pore …………………………………………. Pyricularia (Type genus)
5’. Conidiophores flexuous, branched, conidia obovoid; on Zizania latifolia ……. Xenopyricularia
6. Conidiogenous cells integates terminal, on Asarum ……………………………Pyriculariomyces
6’. not as above……………………………………………………………………………………………. 7
7. Conidiogenous cells terminal forming a rachis with densely protruding denticles ………..…… 8
7’. Conidiogenous cells terminal and intercalary with sparsely protruding denticles …………….. 10
8. Conidiogenous cells cylindrical denticles; conidia hyaline to pale brown with darker colored
median cell; conidiogenous cells terminal and intercalary; on leaves of Calathea longifolia ………
…………………………………………………………………………………………….…….. Barretomyces
8’. Conidiogenous cells terminal with flat denticles ……………………….…………….………..….. 9
9. Conidia narrowly obclavate, 1-septate; on leaves and stems of Juncus effuses ………..………
…………………………………………………………………………………..…..……… Macgarvieomyces
9’. Conidiophores short; conidia 2-septate; on Cyperus rotundus, Typha orientalis, and Kyllinga
brevifolia ……………………………………………………………………..…….….. Pseudopyricularia
10. Conidiophores olivacous; on leaves of Commelina communis ………….…….. Neopyricularia
10’. Conidiophores olivacous to medium brown; on Zingiber mioga ………….…. Proxipyricularia
Copyright 2022 by The American Phytopathological Society. Reproduced, by permission, from Luo, J., and Zhang, N. 2022. The Rice Blast Fungus and Allied Species: A Monograph of the Fungal Order Magnaporthales (https://my.apsnet.org/APSStore/Product-Detail.aspx?WebsiteKey=2661527A-8D44-496C-A730-8CFEB6239BE7&iProductCode=46826). American Phytopathological Society, St. Paul, MN.