Rhubarb is a perennial plant grown in cooler climates. It has been around for several hundred years, and is sometimes called "pie plant". The stems are the edible part; the leaves are poisonous. It comes up early in the spring from a crown of thick roots, grows quickly, and dies back late in the fall. Rhubarb is picked only in the spring and early summer when it is most juicy and the stems are hard and crisp. Later the leaves turn yellow and the stems become soft and it is no longer satisfactory for eating. In Colonial times it was often used as a spring tonic, as it is a mild laxative. It is most often served cooked in sauce, pies, or cobblers, but some people eat it raw, dipped in a little salt. However, it is very tart (sour), and most people would rather eat it sweetened.
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