species in section associated with plants in China.

Plants of the genus have been widely cultivated because of their medicinal, ornamental, and economic values. It commonly suffers from leaf spot or blight disease leading to considerable losses for their commercial values. During an investigation of 14 provinces or municipalities of China from 2014 to 2022, a total of 122 strains in section were obtained from diseased leaves of spp.. Among them, 12 representative strains were selected and identified based on morphological characterization and multi-locus phylogenetic analysis, which encompassed the internal transcribed spacer of rDNA region (ITS), glyceraldehyde-3-phosphate dehydrogenase (), translation elongation factor 1 alpha (), RNA polymerase second largest subunit (), major allergen gene (), an anonymous gene region (OPA10-2), and endopolygalacturonase gene (). The strains comprised two known species of and , and two new species of and , which were described and illustrated here. Their pathogenicity evaluated on indicated that all the strains could induce typical leaf spot or blight symptoms. The results showed that the virulence was variable among those four species, from which sp. nov. was the most virulent one, followed by sp. nov., and .