Phylum:Ascomycota >> Class: Ascomycetes >>  Order: Dothideales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Guignardia clematidis

Guignardia clematidis W. H. Hsieh et al., Mycol. Res. 101: 901-903. 1997.

 Description: Colony of sparse, superficial mycelium, surrounding the gregarious or solitary, epigenous, ascomata. Ascomata 155-200 μm in diam., immersed, globose, with the apex slightly erumpent and capped by a reduced clypeus. Peridium of two layers, the outer 10-18 μm thick, composed of dark brown, slightly compressed cells, the inner hyaline, thickest at the base up to 20 μm, attenuating towards the lateral sides. Asci 63-75 × 22-28 μm, at different levels, bitunicate, clavate with a prominent ‘nasse apicale’, pedicel 20-65 μm long, hamathecium lacking in mature ascoma. Ascospores 18-24 × 8-12 μm, obovate to rhomboid, aseptate, hyaline.

Taiwan, Taitung County, Hsianyang, 10 May 1991, holotype IMI 369599 and isotype NCHUPP-2235.

 Habitat: On living leaves of Clematidis hayatae Kudo & Masamune.



Chen, CC. 1967.


W. H. Hsieh

 Note: No species of Guignardia have been reported on members of Ranunculaceae.The aseptate ascospores and other characters of the ascomata and asci including the Phyllosticata anamorph place this fungus in Guignardia. Occasionally Phyllosticta pycnidia are accompanied by ascomata on the leaf lesions. In shapes and sizes, pycnidia and conidia are similar to ascomata and ascospores. Conidia 14-18 × 8-11 μm, hyaline, aseptate, obovoid to ellipsoid with mucilaginous sheath and apical appendage, forming on determinate, holoblastic,hyaline, simple,cylindrical, apical conidiogenous cells arising from the innermost layer of cells lining the pycnidial cavity.