Phylum:Ascomycota >> Class: Dothideomycetes >> Order: Dothideomycetes | ||||
BCRC Number: | NO BCRC Number! | |||
Scientific Name: | Pseudocercospora pyrina | |||
Author: | Pseudocercospora pyrina Goh & Hsieh. Cercospora and similar fungi from Taiwan. Maw Chang Book Company, Taipei, Taiwan, 1990. |
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Description: | Leaf spots none or indefinite on the upper surface. Fruiting amphigenous, but more abundant on the lower surface, effuse, grayish, without definite border, usually confluent and covering a large area of the leaf surface. Stromata none or only epiphyllous, substomatal or erumpent, globular, dark brown, up to 35 μm wide. Secondary mycelium well developed, external, hypophyllous: hyphae subhyaline to very pale olivaceous, emerging from the stomata, septate, branched, 1.5-3 μm wide, bearing secondary conidiophores as erect side branches. Primary conidiophores 2-4 in a fascicle without a stroma or densely fasciculate on a prominent stroma, olivaceous to very pale olivaceous brown, paler towards the apex, indistinctly 0-3 septate, sometimes constricted, irregular in width, broader at the apex, straight or sinuous, sometimes branched, geniculate, conic or conically rounded or subtruncate at the apex, 20-45 × 3-4.5 μm; conidial scars unthickened. Secondary conidiophores borne on external secondary mycelial hyphae, similar in respect to the primary conidiophores, 7-40 × 3-4.5 μm. Conidia subhyaline to very pale olivaceous, cylindric or cylindro-obclavate, straight to rarely curved, indistinctly 2-6 septate, subacute to subobluse at the apex, subtruncate or obconically truncate at the base, 15-50 × 2-3 μm, hilum unthickened. | |||
Specimens: | Taiwan, Taichung, NCHU Campus, 15 Dec. 1984, holotype, NCHUPP-60. |
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Habitat: | On leaves of Pyrus lindleyi. | |||
Distribution: | Taiwan. |
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References: | null |
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Provided: | W. H. Hsieh |
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Note: | Pseudocercospora piricola (Sawada) Goh & Hsieh differs from this fungus by the absence of extensive external secondary mycelium and by its conidiophores which are unbranched, cylindric, and densely fasciculate on stromata. | |||