Araucaria, a genus of cone-bearing evergreen trees related to pines. The trees are found in South America and Australia and on islands of the South Pacific. There are about 15 species, ranging in height from 50 to 200 feet (15 to 60 m). The best-known species are the Chile pine and the Norfolk Island pine. Both have been introduced into the United States. The Chile pine, or monkey puzzle tree, has prickly, intricately twisted branches. It is a commercially valuable tree whose wood is used primarily for paneling, furniture, and paper. Young Norfolk Island pines are popular as potted plants.

Araucarias belong to the family Araucariaceae. The Chile pine is Arucaria araucana; the Norfolk Island pine, A. heterophylla or A. excelsa.