 Phylum：Anamorphic fungi >> Class： Anamorphic fungi >> Order： Anamorphic fungi |
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 BCRC Number： |
NO BCRC Number! | |||
| Scientific Name： |
Pseudocercospora alstoniae | |||
| Author： |
Pseudocercospora alstoniae Goh & Hsieh, Bot. Bull. Acad. Sin. 30:122-123. 1989. |
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| Description： |
Leaf spots indefinite on the upper surface, merely irregular yellowish discoloration, but on the corresponding lower surface consisting of brown punctalion with indefinite yellowish zone, up to 10 mm wide. Fruiting amphigenous, but more abundant on lower surface. Stro-mata none or poor on lower surface but up to 40 μm wide on upper surface, erumpent, irregular, dark brown, bearing fascicle of conidiophores. Conidiophores up to 20 in a fascicle, on. lower surface subfasciculate or arise as lateral branches from interlacing hyphae, plainly branched, pale brown, paler towards the apex, geniculate, 0-4 septate, 10-80 × 3-5 μm. Conidia cylindric to obclavato-cylindric, pale olivaceous brown, straight to mildly curved, indistinctly 3-7 septate, sometimes constricted, obtuse or rounded at the apex, short obconically truncate at the base, 30-60 × 2.5-4 μm. | |||
| Specimens： |
Taiwan, Nantou Hsien, Lien Hua Chih, 14 Jan. 1988, NCHUPP-248. |
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| Habitat： |
On leaves of Alstonia scholaris (L.) R. Br. | |||
| Distribution： |
Taiwan. |
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| References： |
null |
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| Provided： |
W. H. Hsieh |
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| Note： |
There are no other Pseudocercospora or Cercospora-like fungi reported on Alstonia spp. This fungus differs from other Pseudocercospora and Cercospora-like fungi in the family Apocynaceae chiefly by its plainly branched conidiophores and by its coloured cyl-indric conidia. Cercospora plumeriae Chupp (1954) differs from this fungus by its distinct leaf spots, epiphyllous fruiting and unbranched conidiophores. | |||