ML strict consensus tree from mitochondrial matR . Strict consensus of two trees obtained from ML analysis of the 77-taxon mitochondrial matR matrix. Clades with Bayesian posterior probabilities between 0.9 and 1.0 are indicated by thick lines. Bootstrap percentages from MP analysis shown above lines. Rafflesiales taxa are shown in bold italics. Arrow represents a putative cases of horizontal gene transfer. The small phylogram is included to demonstrate branch length heterogeneity.