Figure 1From: Study on essential oils from four species of Zhishi with gas chromatography–mass spectrometryPCA scores plot (PC1 vs. PC2) of the four species of Zhishi samples: 35 samples from CA , 15 samples from CJ, 21 samples from CS and 4 samples from PT . (CA = (red star) CJ = (green triangle), CS = (black diamond) and (PT = blue circle)).Back to article page