This function adds a tip to all branches of the tree and returns a a list of trees as an object of class "multiPhylo".
add.everywhere(tree, tip.name)an object of class "phylo".
a string containing the name of the tip to add.
A list of trees as an object of class "multiPhylo". Since the tip can be added to any branch, the length of the list is equal to the number of edges in tree.
Revell, L. J. (2012) phytools: An R package for phylogenetic comparative biology (and other things). Methods Ecol. Evol., 3, 217-223.