Figure 1.

Cluster analysis based on a binary presence-absence matrix of the volatile profile of 15 taxa [4] and C. europaea using Euclidean distances between taxa. Unidenntified compounds were omitted from the analysis. By comparing our data with those of the 15 taxa studied by Jürgens [4] it is clear that C. europaea falls within the group of other three species: Hoodia gordonii, Desmidorchis flava and Orbea semota spp. orientalis.