Phylum:Ascomycota >> Class: Dothideomycetes >> Order: Dothideomycetes | ||||
BCRC Number: | NO BCRC Number! | |||
Scientific Name: | Pseudocercospora polygonicola | |||
Author: | Basionym: Cercospora polygonicola Kar & Mandal, Trans. Br. mycol. Soc. 53:354 1969.. Pseudocercospora polygonicola (Kar & Mandal) Deighton. Trans. Br. mycol. Soc. 88(3):365-391, 1987. |
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Description: | 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. |
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Habitat: | On leaves of Polygonum hydropiper L. | |||
Distribution: | India, Taiwan. |
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References: | Hsieh, WH and Goh, TK. 1990. Sawada, K. 1943a. |
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Provided: | W. H. Hsieh |
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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. | |||