Table 1.

Plant materials used in this work.

Species		No.	Origin	Province
S. involucrata	I	17	Hejing, Zhaosu, Heshuo, Urumqi, Shihezi, and Bayingolin	Xinjiang
	II	17	Fukang, Jimusa'er, Mulei, Qitai, Hami, Barkol, and Tianchi	Xinjiang
	III	6	Kashgar	Xinjiang
	IV	3	Gongliu	Xinjiang
S. orgaadayi		8	Qinghe, Fuyun, Altai, and Keketuohai	Xinjiang
S. laniceps		5	Jiulong, Nyingchi, and Nagqu	Sichuan; Xizang
S. medusa		6	Qamdo, Tingri, Yadong, Lanzhou, and Ganzi	Xizang; Gansu; Sichuan
S. tridactyla		5	Dingri, Xigaze, Nagqu, and Lhasa	Xizang
S. simpsoniana		5	Dingri, Xigaze, Yadong, and Lhasa	Xizang
Total		72

Roman number I is the master haplotype of S. involucrata, which possessed another three haplotypes with three variable sites at the 103^rd (T-C), 156^th (C-T), and 167^th (T-C) for IV, III, and II, respectively.