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. |
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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. |
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Habitat: | On leaves of Chionanthus retusus Lindl & Paxton var. serrulatus (Hayata) Koidz. | |||
Distribution: | Taiwan. |
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References: | null |
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Provided: | W. H. Hsieh |
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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. | |||