APPENDIX 1 .Sampling information for species in this study. All voucher specimens are deposited at the herbarium of Central South University of Forestry and Technology, Changsha, Hunan, China. Species Population code Voucher no. Glyptostrobus pensilis PNSL Lin170804 GZHN Lin170411 DM Lin170729 Taxodium Li180522 distichum Taxodium Li180522 ascendens Cryptomeria Wang180720 fortunei Cunninghamia Li180522 lanceolata Note: N = number of individuals sampled. Collection locality Pingnan,Fujian, China Guangzhou,Guan gdong,China Doumen,Guangd ong,China Changsha,Hunan, China Changsha,Hunan, China Jiujiang,Jiangxi, China Changsha,Hunan, China Geographic coordinates 27°0'27.87"N, 118°51'59.75"E 23°11'24.6"N, 113°21'38.13"E 22°23'42.5"N, 113°15'14.65"E 28°8'16.48"N, 112°59'28.36"E 28°8'16.48"N, 112°59'28.36"E 29°32'59.77"N, 115°58'03.32"E 28°8'16.48"N, 112°59'28.36"E Altitude (m) N 1260 29 40 21 20 33 90 5 90 5 911 5 90 5