Dendrology is the branch of botany that deals with the study of woody plants, mainly trees and shrubs. It focuses primarily on economically important species, examined from the viewpoint of systematic and phytogeographical, but also in anatomical and physiological aspects, in relation to stem growth, wood production and environmental aspects of its growth.

It is mainly used the description of leaves, stems, flowers and fruits to identify the different species of trees across dichotomous keys that are grouped by their characteristics.

Dendrochronology is the investigation of history by examining tree growth rings, is a specific feature, which also pays off for the understanding of recent climate change, applied to actual specimens, and lastly, when examining fossil trunks.

One of the functions of Dendrology is also the identification of trees. There are different types of classifications within tree species. By the type of leaf can be distinguished or leaved deciduous trees that lose their foliage for part of the year, usually the cold season in temperate climates, and warm arid and arid climates and evergreen trees, not is not to lose the leaves, but not lose them all at once or even with annual rate, but longer.

The main distinction is established between growing trees and trees growing monopodial simpódico. In the monopodial growth in length is based on a vertical main stem coming out, with sharp angles, lateral branches subordinate, less thick. Monopodial growth results in a pyramid shape, as is characteristic of conifers. Simpódico growth, develop branches arising near the apex (end) of those in which they rest, replacing growth. The tops of these trees are usually more spherical or cylindrical and less pyramidal.

In English, but usually not in Castilian, it is the palm trees (palm trees). Palmeroide biotype occurs in several plant groups, highlighting the cycads (Cycadophyta) and, especially, the angiosperms of the family Arecaceae (Arecaceae).