Phylum:Ascomycota >> Class: Dothideomycetes >>  Order: Dothideomycetes 
   
 
 BCRC Number NO BCRC Number!  
   
 Scientific Name: Pseudocercospora chionanthi-retusi
 
   
   
 Author:

Pseudocercospora chionanthi-retusi Goh & Hsieh. Cercospora and similar fungi from Taiwan. Maw Chang Book Company, Taipei, Taiwan, 1990.

   
 
 
 
 
 Description: Leaf spots angular to irregular, vein-limited, scattered, 1-2 mm wide, often confluent and up to 6 mm wide, grayish brown on upper surface, very pale brown on lower surface. Fruiting hypophyllous, abundant. Stromata slight to well developed, 25-60 μm wide, globose, substomatal or erumpent, dark brown. Conidiophores densely fasciculate, pale fuligineous, straight to tortuous, irregular in width, simple or rarely branched, 0-2 geniculate, 0-2 septate, sometimes constricted at the septa, conically rounded at the apex, 15-30 × 2.5-3 μm, conidial scars unthickened and inconspicuous. Conidia hyaline, cylindric to cylindro-obclavate, straight to mildly curved, 2-6 septate, not constricted at the septa, subacute to subobtuse at the apex, obconic to obconically truncate at the base, 15-55 × 2-3 μm; hilum unthickened and inconspicuous.
 
 
 
 
 
 Specimens:

Taiwan, Taipei, Nankang, 29 Aug. 1986, holotype NCHUPP-23a.

 
 
 
 Habitat: On leaves of Chionanthus retusus Lindl & Paxton var. serrulatus (Hayata) Koidz.
 
 
 
 Distribution:

Taiwan.

 
 
 
 References:

null

   
   
   
 Provided:

W. H. Hsieh

 
 
 Note: This fungus and Cercospora chionanthi-retusi Togashi & Katsuki (Sci. Repts. Yokohama nat. Univ. Sect. II. 1:1, 1952) may be synonymous. The species on this host recorded in Taiwan by Chen (1966) is Cercospora chionanthi Ellis & Everhart (Field Col. Mus. Bot. Ser. 1:94, 1896), however it differs from this fungus by its relatively wider, darker conidiophores and conidia, and by the large circular leaf spots it causes on the host.