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Table 1 Plant samples of Xihuangcao collected

From: Rapid differentiation of Xihuangcao from the three Isodon species by UPLC-ESI-QTOF-MS/MS and chemometrics analysis

Sample no.

Species

Source

Date of collection

IL-01

Isodon lophanthoides

Baiyun, Guangdong Province (transplant from Fujian)

July 2012

IL-02

Isodon lophanthoides

Baiyun, Guangdong Province

July 2012

IL-03

Isodon lophanthoides

Yingde, Guangdong Province

July 2012

IL-04

Isodon lophanthoides

Yingde, Guangdong Province

July 2012

ILG-01

Isodon lophanthoides var. graciliflora

Pingyuan, Guangdong Province

July 2012

ILG-02

Isodon lophanthoides var. graciliflora

Pingyuan, Guangdong Province

July 2012

ILG-03

Isodon lophanthoides var. graciliflora

Heping, Guangdong Province

July 2012

ILG-04

Isodon lophanthoides var. graciliflora

Baiyun, Guangdong Province

July 2012

ILG-04

Isodon lophanthoides var. graciliflora

Shatin, Hong Kong

August 2013

ILG-05

Isodon lophanthoides var. graciliflora

Meizhou, Guangdong Province

September 2013

ILG-06

Isodon lophanthoides var. graciliflora

Panyu, Guangdong Province

February 2014

IS-01

Isodon serra

Yingde, Guangdong Province

July 2012

IS-02

Isodon serra

Baiyun, Guangdong Province

July 2012

IS-03

Isodon serra

Zhaoqing, Guangdong Province

July 2012

IS-04

Isodon serra

Panyu, Guangdong Province

February 2014