Maguey sierrudo (also spelled cerrudo) most commonly refers to an Agave americana. This means that it is closely related to Maguey arroqueno, sierra negra, and coyote. This maguey is enormous. It generally takes 16-20 years to mature and can grow up to 1,000 pounds in weight. There are some regions, however, that use the name sierrudo to describe an Agave rhodacantha.