Bayesian likelihood tree for Selaginella and Physcomitrella EXPB genes with selected rice and Arabidopsis sequences. Burnin was set to 150,000. Tree was rooted manually at AtEXPA1. Clade and groupings are marked with circles. Selaginella sequences are labeled in orange and boxed, rice in blue, Arabidopsis in black, and Physcomitrella patens in purple.