Fig. 5

The contents of 8 components in the 30 samples from different regions. A The content of Leonurine (C1), 4',5-dihydroxy-7-methoxyflavone (C3), rutin (C4) and hyperoside (C11). B The content of apigenin(C15), quercetin(C16), kaempferol (C17) and salicylic acid (C30). C The content of combination of 8 components in 30 samples