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Perianth
The perianth (perigonium, perigon or perigone in monocots) is the non-reproductive part of a flower. It is a structure consisting of the calyx (sepals) and the corolla (petals); in perigones it consists of the tepals. It forms an envelope surrounding the sexual organs,. The term perianth is derived from Greek (peri, "around") and (anthos, "flower"), while perigonium is derived from (peri) and (gonos, "seed, sex organs").
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