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. 2022 Mar 29;9:819753. doi: 10.3389/fnut.2022.819753

Figure 2.

Figure 2

(A) Map showing geographic locations of S. tortuosum (blue), S. strictum (red), S. rigidum (purple) and S. emarcidum (green) found in South Africa; (B) Heat-map illustrating alkaloid diversity of tentatively identified alkaloids from all twelve Sceletium populations; (C) Principal component analysis (PCA) on all populations of Sceletium.; (D) Supervised partial least squares discriminant analysis (PLS-DA) on all populations of Sceletium; (E) PCA bi-plot of phytochemicals contributing to separation; (F) PLS-DA loadings plot of phytochemicals contributing to separation.