Almost every tea enjoyed comes from a specific species of plant known as the camellia sinensis. There are two varieties of this plant that each yield different types of teas, with specific characteristics that define each one. Black tea, called "red tea" in China, is the strongest-tasting variety due to its oxidation time in processing. Oolong tea, known for its flowery notes similar to green tea, is less oxidized. Green tea, the mildest variety, does not undergo oxidation at all and is pan-fried in processing to prevent oxidation from occurring.