Fig. 3 in Terpenoid profiles of resin in the genus Dracaena are species specific

Fig. 3. Principal component analyses (PCA) of transformed GC × GC-MS data of eight monoterpenes (M) identified in Dracaena spp. resin. (A) Variables factor map represents projection of variables (M1-8, Table 1) on the plane defined by the first two principal components. (B) Hierarchical clustering is score plot describing the species and their clustering. Coloured boxes indicate particular clusters. Key: C – Dracaena draco subsp. draco from Canary Islands; E − D. ombet from Ethiopia; M – D. draco subsp. ajgal from Marocco; O – D. serrulata from Oman; S – D. cinnabari from Socotra.