Table 1. Rheum tanguticum sample information.

label	Collecting Time	Source	Longitude/°E	Latitude/°N	Altitude/m
1	Autumn, 2017	Hezuo	102.91	35.00	3136
2	Spring, 2019	Hezuo	102.91	35.00	3136
3	Autumn, 2019	Hezuo	102.91	35.00	3136
4	Autumn, 2018	Hezuo	102.91	35.00	3136
5	Autumn, 2018	Hezuo	102.91	35.00	3136
6	Autumn, 2018	Hezuo	102.91	35.00	3136
7	Autumn, 2018	Hezuo	102.91	35.00	3136
8	Autumn, 2017	Hezuo	102.91	35.00	3136
9	Autumn, 2019	Xiahe, Hezuo	102.52	35.20	3471
10	Autumn, 2019	Lintan, Hezuo	103.35	34.69	2867
11	Autumn, 2019	Qinghai	101.77	36.65	2261
12	Autumn, 2019	Qinghai	101.77	36.65	2261
13	Autumn, 2018	Qinghai	101.77	36.65	2261
14	Autumn, 2018	Qinghai	101.77	36.65	2261
15	Autumn, 2019	Huangzhong, Qinghai	101.57	36.50	2600
16	Autumn, 2018	Huangzhong, Qinghai	101.57	36.50	2600
17	Autumn, 2018	Datong, Qinghai	101.69	36.93	3451
18	Autumn, 2017	Guide, Qinghai	101.44	36.07	2200