Taxodium mucronatum, commonly known as Montezuma bald cypress, Montezuma cypress, or ahuehuete, is a species of Taxodium that is primarily native to Mexico and Guatemala, with a few populations in the southwestern United States. Ahuehuete is derived from the Nahuatl name for the tree, āhuēhuētl, which means "upright drum in water" or "old man of the water."

El Árbol del Tule is a tree located in the church grounds in the town center of Santa María del Tule in the Mexican state of Oaxaca, approximately 9 km (6 mi) east of the city of Oaxaca on the road to Mitla. It is a Montezuma cypress, or ahuehuete. It has the stoutest tree trunk in the world. In 2001, it was placed on a UNESCO tentative list of World Heritage Sites, but was removed from the list in 2013.