Herbal tea

Herbal tea, or, more properly, tisane (UK /tɪˈzɑːn/, US /tɪˈzæn/), is any beverage made from the infusion or decoction of herbs, spices, or other plant material in hot water, and usually does not contain caffeine. These drinks are distinguished from true teas (black, green, white, yellow, oolong, etc., which are prepared from the cured leaves of the tea plant, Camellia sinensis), as well as from decaffeinated tea, in which the caffeine has been removed. These beverages are therefore labelled infusion or tisane.

Like beverages made from true teas, herbal teas can be served hot or cold. Documents have been recovered dating back to Ancient Egypt and Ancient China that discuss the enjoyment and uses of herbal teas. Among the Chinese, herbal teas are commonly known as liang cha (Chinese: 涼茶; pinyin: liáng chá; Jyutping: loeng4 caa4).

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Wikipedia