Table 1. The details of the 20 batches Schizonepetae Spica samples and fingerprint similarities.

No.	Voucher specimens	R	G	B	Calyx color	Collection place	Date of collection	Similarities
1	YP132581301	90.72	74.52	40.40	Brownish	Henan province	November 29, 2018	0.978
2	YP132581401	81.27	62.55	31.23	Brownish	Henan province	January 17, 2019	0.964
3	YP132581501	92.32	98.24	45.06	Yellowish-green	Guangdong province	January 8, 2019	0.996
4	YP132581601	83.33	92.22	45.67	Yellowish-green	Hubei province	January 9, 2019	0.996
5	YP132581701	96.10	100.26	46.23	Yellowish-green	Hubei province	January 10, 2019	0.987
6	YP132581801	87.09	72.65	37.53	Brownish	Shanxi province	January 9, 2019	0.988
7	YP132581901	86.25	99.15	51.51	Yellowish-green	Shanxi province	January 12, 2019	0.994
8	YP132582001	81.02	92.38	45.57	Yellowish-green	Anhui province	January 10, 2019	0.994
9	YP132582101	81.51	68.26	38.24	Brownish	Anhui province	January 19, 2019	0.999
10	YP132580101	80.62	71.34	45.02	Brownish	Hebei province	June 7, 2018	0.986
11	YP132582201	80.59	95.29	39.18	Yellowish-green	Jiangsu province	January 10, 2019	0.997
12	YP132582301	97.19	105.54	52.24	Yellowish-green	Hebei province	January 9, 2019	0.996
13	YP132582401	85.38	98.34	43.10	Yellowish-green	Hebei province	January 13, 2019	0.998
14	YP132582501	86.35	97.09	40.83	Yellowish-green	Zhejiang province	January 10, 2019	0.999
15	YP132580701	82.43	68.02	40.78	Brownish	Henan province	January 10, 2019	0.989
16	YP132582601	91.48	101.2	53.97	Yellowish-green	Jiangsu province	January 11, 2019	0.994
17	YP132582701	80.12	74.90	41.14	Brownish	Jiangsu province	January 11, 2019	0.989
18	YP132582801	87.14	95.70	42.88	Yellowish-green	Guangxi province	January 11, 2019	0.998
19	YP132582901	92.76	101.42	48.61	Yellowish-green	Jiangxi province	January 11, 2019	0.987
20	YP132583001	84.17	70.81	44.45	Brownish	Jiangxi province	January 12, 2019	0.992

R = red; G = green; B = blue.