Figure 3.

Comparison of cultivar and Escovopsis phylogenies. (a) Cultivar phylogeny as in Figure 1A. (b) Escovopsis phylogeny synthesized from Figure 2. * indicates fungal symbionts from Apterostigma colonies. Clades of Escovopsis corresponding to cultivar clades suggests coevolutionary specialization of the pathogen, but discordance of the host and pathogen phylogenies as a whole suggests occasional host-switching by Escovopsis during the evolutionary history of the association.