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Edible Portion: Rhizome, Tubers, Root, Vegetable, Flowers

An upright perennial plant up to 1-2 m high and a spread of 1 m. The stem is erect and unbranched. The leaves are dull green and sword shaped. The flowers are yellow and daisy like. It produces fleshy underground stem tubers of irregular shape. The skin of these tubers is very thin and often coloured yellow or red. The flesh is white. Tubers can be 10 cm long and 6 cm wide. There are several cultivated varieties.