Figure 5.

Tree showing the classification of the 12 species of grass investigated in this study. The uppermost dark grey box represents all 12 species. The medium grey boxes at the first level of the tree show the 12 species clustered into four groups, labelled G1–4, and colour coded as for figure 2. The light grey boxes at the second level of the tree show the classification of species within each cluster. See table 1 for species codes.