Fig. 7.

Strict consensus tree based on maximum-parsimony analysis of atpB-rbcL, rps16, petD and trnL-trnF showing bootstrap/jackknife support values above the branches. The colour of the species' names indicates their habit: black = (sub)shrubs (or occasionally treelets); brown = woody herbs to (sub)shrubs; purple = geoxylic herbs; green = herbs. Asterisks indicate the species of woody Spermacoceae and Knoxieae taxa that were investigated in this study. This tree supports our wood anatomical hypothesis: the common ancestor of Knoxieae is primarily woody, while the common ancestor of Spermacoceae is herbaceous.