Do you have a substitute for the tea beverage from the Camellia sinensis plant? How would you categorize the infusion drink called Rooibos?

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From Answers.com:

One of the most important plants related to Camellia japonica is the Camellia sinensis, which is the plant tea comes from. This plant is not usually grown in gardens because it has small white flowers, unlike the Camellia japonica, which has larger, more beautiful flowers.

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