Leaf spots orbicula to irregular, scattered, yellowish brown to rusty brown, 3-7 mm wide. Fruiting amphigenous. Secondary mecelium absent. Stromata none. Conidiophores 4-10 in a divergent fascicle, emerging from the stomata, pale olivaceous brown, uniform in colour, clavate, straight, 0-1 septate, not geniculate, not branched, conically rounded at the apex, 25-40 μm long, 3-4 μm wide below but broader (4.5-6.5 um wide) near the apex, conidial scars inconspicuous and unthickened. Conidia subhyaline to pale olivaceous, plainly obclavate, rarely cylindro-obclavate, straight to mildly curved, 3-10 septate, subacute to subobtuse at the apex, obconic at the base, 40-100 × 3-4.5 μm.
Specimens：
Taiwan, Taipei, 25 Nov. 1924, Herb. NTU-PPE.
Habitat：
On leaves of Polygonum hydropiper L.
Distribution：
India, Taiwan.
References：
Hsieh, WH and Goh, TK. 1990. Sawada, K. 1943a.
Provided：
W. H. Hsieh
Note：
Pseudocercospora persicariae (Yamam.) Deighton (1976) differs from this fungus by its sooty fruiting, plainly multiseptate and branched brown conidiophores. Cercospora polygonacea Ellis (Jour. Mycol. 1:24, 1885) differs from this fungus by its acicular conidia and thickened conidial scars.
Phylum：Ascomycota >> Class： Dothideomycetes >> Order： Dothideomycetes 
BCRC Number：