Fig. 56 – L<strong>in</strong>e draw<strong>in</strong>gs of <strong>Cercospora</strong> oxalidis on Oxalis debilis. a. Conidiophores <strong>and</strong> stromata. b. Conidia. Bars = 50 μm. (Meeboon 2009). Fig. 57 – L<strong>in</strong>e draw<strong>in</strong>gs of <strong>Cercospora</strong> platycerii on Platycerium wallichii. a. Conidia. b. Conidiophores <strong>and</strong> stromata. Bars = 50 μm. (Meeboon 2009). 74
ase, paler toward the apex, unbranched, cyl<strong>in</strong>drical, geniculate, s<strong>in</strong>uous at the apex. Conidiogenous cells <strong>in</strong>tegrated, term<strong>in</strong>al, holoblastic, polyblastic, sympodially proliferat<strong>in</strong>g. Conidiogenous loci 2–3 μm diam., conspicuous, thickened <strong>and</strong> darkened. Conidia 25–280 × 1–3 μm, solitary, obclavate to acicular, straight, hyal<strong>in</strong>e, 5–24-septate, smooth, truncate at the base, taper<strong>in</strong>g toward a subacute apex, hila 0.5–2 μm diam., conspicuous, thickened <strong>and</strong> darkened. Specimens exam<strong>in</strong>ed – THAILAND, Doi Sa Ket, Chiang Mai Prov<strong>in</strong>ce, on leaves of P. bifurcatum (Cav.) C. Chr., 5 July 2006, Jamjan Meeboon (CMU 27904); Chiang Mai Prov<strong>in</strong>ce, T. Sansai, on leaves of P. wallichii Hook. (Polypodiaceae), 12 September 2007, Par<strong>in</strong> Noiruang (BBH 23741); Chiang Mai Prov<strong>in</strong>ce, Pang Da Royal Project, on leaves of P. wallichii, 5 August 2008, Jamjan Meeboon (BBH 23733). Hosts – Platycerium bifurcatum, Platycerium sp. (Polypodiaceae) (Crous & Braun, 2003, Meeboon et al. 2007b,c). Distribution – <strong>Thail<strong>and</strong></strong>, USA (Crous & Braun 2003, Meeboon et al. 2007b,c). Notes – The first record of C. platycerii from <strong>Thail<strong>and</strong></strong> was by Meeboon et al. (2007b, c) on P. wallichii <strong>and</strong> P. bifurcatum. Pteridaceae <strong>Cercospora</strong> cyclosori Goh & W.H. Hsieh, Trans. Mycol. Soc. R.O.C. 4: 26 (1989). ≡ <strong>Cercospora</strong> cyclosori Sarbajna & Chattopadh., J. Mycopathol. Res. 28: 14 (1990) (nom. illeg.), homonym of C. cyclosori Goh & W.H. Hsieh (1989). (= C. apii s. lat.) Fig 58 Leaf spots 2–8 mm diam., amphigenous, irregular, white to pale at the center, <strong>with</strong> brown marg<strong>in</strong>, sometimes limited by ve<strong>in</strong>. Caespituli amphigenous. Stromata 23–55 μm diam., substomatal, small to well-developed, composed of a few subglobose, brown-walled cells. Conidiophores 111–190 × 3–5 μm, 9–17 <strong>in</strong> loose fascicules, 5–7-septate, aris<strong>in</strong>g through stromata, straight, smooth, brown at the base, paler toward the apex, unbranched, cyl<strong>in</strong>drical, not geniculate. Conidiogenous cells <strong>in</strong>tegrated, holoblastic, monoblastic, term<strong>in</strong>al, sympodially proliferat<strong>in</strong>g. Conidiogenous loci 2–3 μm diam., Plant Pathology & Quarant<strong>in</strong>e Fig. 58 – L<strong>in</strong>e draw<strong>in</strong>gs of <strong>Cercospora</strong> cyclosori on Pteris biaurita. a. Conidia. b. Conidiophores <strong>and</strong> stromata. Bars = 50 μm. (Meeboon 2009). conspicuous, thickened <strong>and</strong> darkened. Conidia 179–283 × 2.5–3.5 μm, solitary, acicular, straight, hyal<strong>in</strong>e, 14–25-septate, smooth, truncate at the base, taper<strong>in</strong>g toward a subacute apex, hila 1.5–2 μm diam., conspicuous, thickened <strong>and</strong> darkened. Specimen exam<strong>in</strong>ed – THAILAND, Chiang Mai Prov<strong>in</strong>ce, Mae Jam District, Mae- Hae Royal Project Area, on leaves of Pteris biaurita L. (Pteridaceae), 12 February 2008, Jamjan Meeboon <strong>and</strong> Iman Hidayat (BBH 23617). Hosts – Cyclosorus acum<strong>in</strong>atus, Cyclosorus sp. (Thelypteridaceae) (Crous & Braun 2003), Pteris biaurita L. (Pteridaceae) (Meeboon 2009). Distribution – India, Taiwan, <strong>Thail<strong>and</strong></strong> (Crous & Braun 2003, Meeboon 2009). Notes – This specimen is close to C. cyclosori <strong>in</strong> hav<strong>in</strong>g dark brown symptoms, amphigenous caespituli, conidiophores <strong>in</strong> divergent fascicles <strong>and</strong> long acicular conidia <strong>with</strong> truncate base (Hsieh & Goh 1990). Crous & Braun (2003) assigned this species to 75
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etter workable system. Braun (1993)
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Pseudocercospora based on ITS regio
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