"multiPhylo" with a mapped discrete character (e.g., see read.simmap and sorts the columns of each tree$mapped.edge to have the same state ordering. Also works for a single tree.orderMappedEdge(trees, ordering=NULL)"phylo" or "multiPhylo".$mapped.edge. If NULL, then an alphabetical order is assumed. Options are "alphabetical", "numerical", or any specific ordering of the mapped traits (e.g., c("A","B","C""phylo" or "multiPhylo".