The genus Araucaria is in the coniferous family Araucariaceae.  It consists of some 20 species of evergreen trees with whorled leaves, columnar or widely branching, conical, and growing to a height of 200 ft (60 m).  Leaves are broadly-triangular to needle-like, stiff, uniformly clothing the branches.  Native to the southwestern Pacific and South America.  Probably the most common species found in U.S. commerce are A. araucana, Monkey Puzzle; A. bidwillii, Bunya-Bunya; and A. heterophylla, Norfolk Island Pine.
Araucaria: after the Arauco Indians of central Chile, in whose territory the species A. araucana is native.