21. The larvae feed on the leaves of " Camellia tenuifolia " and " Camellia sinensis ". 22. It is the least processed of all the teas, made by quickly steaming or heating the leaves of Camellia sinensis . 23. Japanese green teas are mainly made from Yabukita ( ?v0M0 _ 0 ), a cultivar of the camellia sinensis plant. 24. The larvae feed on " Camellia sinensis " and " Camellia japonica " and is considered a pest. 25. Green Tea . . . . . . . . . . . . Camellia sinensis . . . . . . . Leaves 26. Green tea, black tea and oolong all come from the same evergreen shrub, Camellia sinensis , but they are prepared differently. 27. The larvae have been reported as a minor pest on " Camellia sinensis " and " Cinchona " species. 28. Kukicha ( twig tea ) is also harvested from " Camellia sinensis ", but uses twigs and stems rather than leaves. 29. A neurological basis for humanity s love affair with Camellia sinensis ? " : what does that have to do with tea in general. 30. Well, all tea ( from the camellia sinensis plant ) contains Teanine, which is the chemical responsible for the brain wave effect.