The durian (/ˈdjʊriən/) 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, and over 300 named varieties in Thailand. Durio zibethinus is the only species available in the international market: other species are sold only in their local regions. There are hundreds of durian cultivars; many consumers express preferences for specific cultivars, which fetch higher prices in the market.