is extensively cultivated wherever there is enough water, up to an altitude of c. 2000 m. The chief crop is in Kashmir (Liddar Valley). Tateoka reports that this species is native in India and Indo-China but cultivated throughout the warmer parts of southern Europe, Africa, Asia, Australia and Central and South America. There are numerous cultivars of Rice, their most extensive taxonomic treatment being that of Porteres in J. Agric. trop. 3: 341, 541, 627, 821. 1956.