The durian is the fruit of several tree species belonging to the genus Durio. The name 'durian' is derived from the Malay-Indonesian languages word for duri or "spike", a reference to the numerous spike protuberances of the fruit, together with the noun-building suffix -an. There are 30 recognised Durio species, at least nine of which produce edible fruit. Durio zibethinus is the only species available in the international market: other species are sold only in their local regions.