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The Myrtaceae are a family of dicotyledons, placed within the order Myrtales. Myrtle, clove, guava, feijoa, allspice, and eucalyptus belong here. The plants are mostly woody, with essential oils, and most flower parts in multiples of five. The most distinctive feature of the family is that the phloem is inside the xylem, instead of outside as in all other plants. This means that if you scraped the outer part of these plants' stems off, you would first find xylem, and then phloem.
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