Roselle is Hibiscus sabdariffa, a perennial herb native to the tropics. Roselle is also known as Rosella and in Thailand is called Kra-jiap. Hibiscus sabdariffa grows to about 2m and has pinkish white or pale yellow flowers with a fleshy calyx at the base. As the fruit matures, these calyxes enlarge and turn a purplish
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