Fig. 3From: An integrated study of Violae Herba (Viola philippica) and five adulterants by morphology, chemical compositions and chloroplast genomes: insights into its certified plant originComparative studies of the index components and universal DNA barcoding authentication. A HPLC chromatograms of commercial VH, wild-collected samples, and reference drug. B Total ion current chromatogram of V. prionantha indicating the 4 main index components in positive ion mode. C NJ tree constructed by a two-locus barcode rbcLa and trnH-psbABack to article page