Table 1. The geographic locations of the X. strumarium species used in this study and the chemotypes of their glandular trichomes characterized.

Geographic locations		Types	Major xanthanolides
Guizhou	Zunyi	Type III	8-epi-xanthatin, xanthinosin, xanthatin
	Wangmo	Type I	8-epi-xanthatin, xanthumin
Beijing		Type I	8-epi-xanthatin, xanthumin
Shandong	Taian	Type I	8-epi-xanthatin, xanthumin
Anhui	Langxi	Type I	8-epi-xanthatin, xanthumin
	Hefei	Type I	8-epi-xanthatin, xanthumin
Zhejiang	Lishui	Type I	8-epi-xanthatin, xanthumin
Jiangxi	Gongzhou	Type I	8-epi-xanthatin, xanthumin
Hunan	Huaihua	Type I	8-epi-xanthatin, xanthumin
Sichuan	Guanyuan	Type I	8-epi-xanthatin, xanthumin
	Qingcheng	Type I	8-epi-xanthatin, xanthumin
	Suining	Type I	8-epi-xanthatin, xanthumin
Hubei	Wuhan	Type I	8-epi-xanthatin, xanthumin
	Xianning	Type I	8-epi-xanthatin, xanthumin
	Xishui	Type I	8-epi-xanthatin, xanthumin
	Fangxian	Type I	8-epi-xanthatin, xanthumin
Henan	Nanyang	Type I	8-epi-xanthatin, xanthumin
	Sanmenxia	Type II	8-epi-xanthatin, xanthumin, xanthatin
Gansu	Qiangyang	Type II	8-epi-xanthatin, xanthumin, xanthatin