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SUMMARY
Pure cultures from single ascospores of Tryblidiella Leprieuri from tea give Diplodia-like macropycnidia. Similar cultures of T. rufula (Spreng.) Sacc.? from Rhus give micropycnidia with hyaline sub-globose spores, and Diplodia-like macropycnidia. Cultures from similar material referred to the same species on black cherry gave similar micro- and Diplodia-like macropycnidia which are different from the preceding. Similar cultures from specimens on Melia from Alabama produce micro- and macropycnidia agreeing with those from the specimens on black cherry. Single ascospore cultures of T. hysterina (Duf.) Shear from Ilex vomitoria from two localities gave micropycnidia and Diplodia-like macropycnidia resembling Diplodia Alni.
The Diplodia-like forms obtained appear similar to those obtained from ascospore cultures from Physalospora and raises the question as to what dependence can be placed upon the pycnidial or conidial stages in determining the limits of genera and species of Ascomycetes.