Figure 3

Life cycle evolution shown on one Bayesian species tree. Pie charts at nodes show the% of trees for which the character state at this node was identified as the uniquely best state under MP optimisation (the percentage of equivocal reconstructions include reconstructions that did not yield a single best state for the node concerned, even if one state was more likely than any other): (a) life cycle evolution with facultative heteroecious species considered to be heteroecious; (b) life cycle evolution with facultative heteroecious species considered to be monoecious on trees. ML optimization under the 6 parameter model suggested that all character states were equally likely at all nodes of interest (nodes 1 to 12).