What is a malvaceous plant (Hibiscus Sabdariffa) cultivated in the east and West Indies for its fleshy calyxes, which are used for making tarts and jelly and an acid drink called?

roselle — a malvaceous plant (Hibiscus Sabdariffa) cultivated in the east and West Indies for its fleshy calyxes, which are used for making tarts and jelly and an acid drink. (Webster's 1913.)

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