Projection of the trees onto the fundamental plane for three cases: the analysis of this Appendix B and the one by Fraix-Burnet et al. (2010) both using the four parameters of the fundamental plane, and the principal study of the present paper with six parameters. Thick lines represent the “trunk” of the trees, while the small branches relate the trunks to the mean of each group. For clarity, results are compared two by two, and only the trunks are shown for the three studies on the lower right diagram. These are evolutionary tracks in the sense of diversification, and not the path of evolution for a single galaxy.