Table S3. Number and frequency of occurrence 59 native plant species in 28 sites in a field survey across North China. Species with asterisks were used in the common garden experiment, bioassay and chemical analysis. The difference in the percentage of damaged leaf (binary data of undamaged vs. damaged leaves in a cbind matrix) among sites was tested using a Wald Chi-square test applied on a Generalized Linear Model (GLM) with a binomial distribution. Each non-native species was analyzed separately. Each native species was analyzed separately.