Phylum：Basidiomycota　>>　Class： Ustilaginomycetes　>>　 Order： Exobasidiales 
   
 
　BCRC Number： NO BCRC Number!  
   
　Scientific Name： Exobasidium vexans
 
   
   
　Author：

Exobasidium vexans Massee, Bull. Misc. Inf., Kew: 111, 1898..
   
 
 
 
 
　Description： Leaf blisters circular, chlorosis, pale green to yellow-green, sometimes bearing red color, and slightly concaved up or down. Hymenium composed of basidia and basidiospores without conidia. Basidia hyaline, cylindrical, 66-126.5 × 4-5.8 μm, with 2-3 sterigmata, mostly 2. Sterigmata subulate, (2.5-)3-4 × 1.5-2 μm. Basidiospores hyaline, smooth, obovoid to ellipsoid, slightly curved at the base, (10-)11-16 × 3-5(-5.5) μm, with 1(-3) septa in matured. Basidiospores on WA germinating from each cell with long germ tubes, few germinated basidiospores producing chlamydospores or conidia to form colonies, others just producing long germ tubes and then stop growing to degrade. Colonies on PSA in 20℃, pale yellow and fragile, and growth less than 5 mm in 50 days; becoming pale orange to light brown in six months; consisting of abundant circular chlamydospores and thick hyphae in old cultures.
 
 
 
 
 
　Specimens：

Camellia sinensis (L.) O. Ktze.: Yangmingshan National Park, 17 Oct 2004, NTUPPM-404; Taipei, Shrding, 27 Apr 2005, NTUPPM-502, NTUPPM-503; Yilang, Yu-lang tea garden, Cingsin-Oolong, 28 Apr 2005 NTUPPM-507; Yilang, Yu-lang tea garden, “Wu-yi”, 28 Apr 2005, NTUPPM-508; Yilang, Yu-lang tea garden, “Oolong”, 28 Apr 2005, NTUPPM-509; Yilang, Samshing, “Cingsin-Oolong”, 28 Apr 2005, NTUPPM-510; Yilang, Dongshan Township, 29 Apr 2005, NTUPPM-517; Nantou, Yuchih Township, “Assam”, 2 May 2005, NTUPPM-526; Nantou, Yuchih Branch, Tea Research and Extension Station, “FKK22”, 3 May 2005, NTUPPM-528; Nantou, Yuchih Branch, Tea Research and Extension Station, “Assam Maripuri”, 3 May 2005, NTUPPM-529; Nantou, Yuchih Branch, Tea Research and Extension Station, 3 May 2005, NTUPPM-531, NTUPPM-533, NTUPPM-534; Nantou, Fonghuang tea garden, “Cingsin-Damou”, 4 May 2005, NTUPPM-535; Nantou, Fonghuang tea garden, “Oolong”, 4 May 2005, NTUPPM-536; Nantou, Fonghuang tea garden, “Jin-syuan, Taiwanese No.12”, 4 May 2005, NTUPPM-538; Nantou, Fonghuang tea garden, “Assam”, 4 May 2005, NTUPPM-547; Yilang, Yu-lang tea garden, 4 Apr 2006, NTUPPM-617.
 
 
 
　Habitat： On leaves.
 
 
 
　Distribution：

Worldwide.
 
 
 
　References：

Sawada, K., 1919; Shih, H. H., 2006.
   
   
   
　Provided：

Shih, H. H. and Hsieh, H. J.
 
 
　Note： null