Fig. 3.

Phylogenetic tree of the 2989 species represented in the Root Systems of Individual Plants (RSIP). The highlighted plant families represent the 20 largest families in the RSIP based on the number of species represented (263 plant families overall). The 20 families represent 71% of all observations in the RSIP. The colors from light purple to dark purple represent the number of observations from each plant family. The labels show the plant family name, followed by the number of observations and the number of species (i.e. family no. of observations/no. of species).