"multiPhylo". If trees contains a large number of phylogenies (say 100 or 1,000) this will be much faster than calling RF.dist in the phangorn package for all pairwise comparisons because it avoids repeating some internal calculations. Nonetheless for large numbers multiRF is slow, and will use lots of memory.multiRF(trees)"multiPhylo" consisting of two or more fully bifurcating, unrooted trees. If trees are rooted, they will be unrooted."multiPhylo". Uses prop.part internally for most of the heavy lifting.