The oolongs are a first cousin once removed from the black teas. Oolong tea is partially oxidized to lie somewhere between black and green. While the look is more along the lines of black teas, the taste is closer to the green teas but with a touch more oomph and a rounded mouthfeel. Oolongs are commonly produced in the Fujian province of China and on the island of Taiwan, formerly called Formosa, from which one of the more famous oolong teas is named.