Abstract A description is provided for Pseudocercospora lilacis , a parasitic fungus causing leaf spots on living leaves of ornamental plants in the genera Ligustrum and Syringa . Some information on its habitat, dispersal and transmission, and conservation status is given, along with details of its geographical distribution (North America (USA (Alabama, Florida, Maine, Minnesota, Mississippi, South Carolina and Texas)), South America, Asia (China (Henan), Japan and Russia (Primorye krai)), Atlantic Ocean (Bermuda) and Europe (Austria, Belarus, Belgium, France, Germany, Italy, Lithuania, Russia (Kursk oblast and Ulyanovsk oblast) and Ukraine)) and hosts ( Ligustrum japonicum, L. lucidum, L. sinense, Ligustrum sp., Syringa oblata (also as S. oblata var. affinis ), S. persica, S. reticulata subsp. amurensis (as S. amurensis [ S. reticulata ]), S. reticulata var. mandshurica, S. vulgaris and Syringa sp.).