Lotus tea is an infusion made from lotus leaves, flowers, roots, fruit, seeds, or embryos. it is known as liánchá (莲茶, 蓮茶, [ljɛ̌n.ʈʂʰǎ]) in chinese and yeoncha (연차, 蓮茶, [jʌn.tɕʰa]) in korean. it is also known as trà sen in vietnamese.

Source: Wikipedia