Tree representations figure throughout Llull's work, culminating in Arbor scientiae, a collection of tree-based diagrams of science and human knowledge, published in 1296.

The result is a multidimensional Venn diagram that records the overlaps between languages. Each of the 103 languages, with its cognate sets, temporal and geographical range, constituted one leaf ...

A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor. Phylogenies are useful ...