A phylogenetic tree is a branching diagram showing phylogeny.
A phylogenetic tree or evolutionary tree is a branching diagram or `` tree '' showing the inferred evolutionary relationships among various biological species or other entities -- their phylogeny -- based upon similarities and differences in their physical or genetic characteristics . Phylogenetics . The result of these analyses is a phylogeny ( also known as a phylogenetic tree ) -- a diagrammatic hypothesis about the history of the evolutionary relationships of a group of organisms .