3.1 SDM and its accuracy
The ROC curve was used to assess the potential distributions of S. ciliatum, S. nepalense , and S. yunnanense , and the AUC values of training data were 0.988, 0.981, and 0.958, respectively (Fig. 3). This showed that the distribution records of S. ciliatum , S. nepalense , and S. yunnanense predicted based on the MaxEnt model were not random, and the prediction of the model was reliable.