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RhubarbRheum is a genus of perennial plants that grow from thick short rhizomes. The genus is in the family Polygonaceae, and includes the vegetable rhubarb (Rheum rhabarbarum or Rheum x hybridum.) The plants have large leaves that are somewhat triangular shaped with long fleshy petioles. The flowers are small, greenish-white to rose-red, and borne in large compound leafy inflorescences. Rhubarb is often consumed and a number of varieties are grown for their stems which are used in pies and other foods for their tart flavor.DescriptionRheum species are herbaceous perennials with hermaphrodite flowers, consisting of a colored perianth, composed of six to nine segments, arranged in two rows. The flowers have nine stamina inserted on the torus at the base of the peranthium, they are free or subconnatent at their base. The ovary is simple and triangular shaped with three styles. The fruits are a three-sided caryupsis with winged sides, the seeds are albuminous and have straight embryos.
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