Defining a Tree

We define a tree as a woody plant that grows from a single base and is at least 2 meters high. Quite often a plant that normally grows as a shrub can be pruned to grow into a tree, and we have also included some natives that hardly ever grow into trees. Our definition of trees includes palms. Palms almost never branch, and their woodiness is produced differently than a normal tree. Occasionally we have added species that are shrubs or vines, but closely related to a tree, and we have added many native shrubs that almost never become trees.