Fig. 2

A Heatmap of the chemical similarity across the 24 largest genera based on number of plants and chemical information. The genus of each species is colored on the x and y axes. Note that the matrix displays the distance between pairs of species based on their chemical similarity. Details on the hierarchical clustering used and the definition of chemical similarity used to define the distance between the plants are described in the methods section. B Heatmap of chemical similarity focusing on a random subset of the 24 genera