A lesser-known type of tea, oolong tea is made from the leaves of the Camellia sinensis plant, the same plant used to make black and green tea. The difference is in how the tea leaves are processed. Unlike black tea, which is fully oxidized with deep black leaves, oolong tea is partially oxidized. Oolong tea is sometimes referred to as brown tea, halfway between a black and green tea. A tea with great body and the most intense, varied aroma and flavours.