An oroblanco or sweetie is a cross between an acidless pomelo and a white grapefruit. It is slightly larger in size than a grapefruit but has fewer seeds and is sweeter. When ripe, its thick rind is bright green or golden in color. The oroblanco fruit has a similar taste to the scent of its flowers. The tree does not grow in cold conditions, but it has a tendency to adapt to its environment very fast and is a vigorous grower. The oroblanco was patented by the University of California after its development at that university's citrus experiment station in Riverside, California. A similar fruit is also commonly cultivated in Israel (since 1984), where the trademark 'Sweetie' originated.