Decaffeination this trait could be bred into other coffee plants by crossing them with "C. charrieriana", or an equivalent effect could be achieved by knocking out the gene for caffeine synthase in normal coffee plants. Tea may also be decaffeinated, usually by using processes analogous to the direct method or the CO process, as described above. The process of oxidizing tea leaves to create black tea ("red" in Chinese tea culture) or oolong tea leaves from green leaves does not affect the amount of caffeine in the tea, though tea-plant subspecies (i.e., "Camellia sinensis sinensis" vs. "Camellia sinensis assamica") may differ
Camellia taliensis is the tea variety traditionally cultivated in Yunnan. Like "C. sinensis, C. taliensis" contains both theanine and caffeine. "C. talensis" can be easily crossed with "C. sinensis," and the resulting crossbred plants are intermediate between species both morphologically and chemically indicating true hybrids. "Camellia taliensis" is locally used to make white tea, black tea, and pu'er tea. Yue Guang Bai (月光白 "Moonlight White") is a white tea made from the plant. Yunnan pu-erh tea made from "C. taliensis" can command a much higher price than pu'er made from the more common "C. sinensis." Camellia taliensis Camellia taliensis (also Yunnan large