2 Materials and Methods
2.1 Data of the Species occurrence
The distribution data of S. ciliatum , S. nepalense , andS. yunnanense in China were obtained from the National Specimen
Information Infrastructure (http:// www. nsii. org. cn/), the National
Plant Specimen Resource Center (http://www.cvh.ac.cn/) and the Global
Biodiversity Information Fcility (https:www.gbif.org/). The geographical
coordinates were not recorded in detail in some distribution points.
Thus, Google Earth (http://ditu.google.cn/) was used to obtain the
geographical coordinates of the points. Points with repeated latitude
and longitude and missing points with latitude and longitude were
deleted. In the study, a total of 44, 20, and 16 distribution data
samples of S. ciliatum , S. nepalense , and S.
yunnanense were gathered and utilized to run the MaxEnt model
simulation (Fig. 1).