Fig. 9. Chytridiales, Family Olpidiaceae. Olpidium viciae Kus. (A) Zoospores. (B) 

 Zoospores uniting. (C) Biflagellate zygotes. (D) Infection of host cell by zygote. (E) 

 A thin-walled zoosporangium and a resting zoosporangium in the same host cell. (F) 

 Thin-walled zoosporangia in host cells. (G) Host cell with many resting zoosporangia. 

 (H) Resting zoosporangium discharging zoospores. (After Kusano: J. Coll. Agr., Imp. 

 Univ. Tokyo, 4(3):141-199.) 



48 



