This family of monocotyledons comprises about 115 genera and 2000 species, the majority of which are tropical. The flowers have no bracts and are usually massed in a cylindrical spadix, wrapped in an enclosing spathe. Often the flowers have an offensive smell to attract flies as pollination agents. Some species are climbers with aerial roots such as the Swiss Cheese Plant, Monstera. There are also many ornamental species, often grown as houseplants.