Fig. 2: OrthoFinder gene family analysis.

The OrthoFinder inferred species phylogeny is displayed on the left. The branch thickness is scaled based on the number of predicted duplicated events to have occurred at the descendent node; thinner branches indicate fewer duplications, thicker branches indicate more (see Table S7). Internodes discussed in the text (N1, N5, N10, and N15) are labeled (the species tree with all labeled internodes can be accessed in Table S7). Asterisks (*) indicate known shikonin/alkannin-producing species. Horizontal bar plots (right) indicate the number of orthogroups that are species-specific (red), maintained in all 32 species (green), or present in more than one but less than all species in the analysis (blue)