Tea plants will grow into a tree if left undisturbed, but cultivated plants are pruned to waist height for ease of plucking. Two principal varieties are used, the small-leaved Chinese variety plant (''C. sinensis sinensis'') and the large-leaved Assamese plant (''C. sinensis assamica''), used mainly for black tea. | Tea plants will grow into a tree if left undisturbed, but cultivated plants are pruned to waist height for ease of plucking. Two principal varieties are used, the small-leaved Chinese variety plant (''C. sinensis sinensis'') and the large-leaved Assamese plant (''C. sinensis assamica''), used mainly for black tea. |