Fig. 3From: Strigolactone synthesis is ancestral in land plants, but canonical strigolactone signalling is a flowering plant innovationOptimal phylogeny for CCD8 family. Maximum likelihood (ML) tree with the amino acid dataset under the PROTCATLGX model in RAxML. Topology rooted with the hornwort CCD8 clade. Key bootstrap values are shown along the backbone of the tree. The fully labelled phylogeny is shown in Additional file 9CBack to article page