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Cross-section of a peach, a monopyrenous drupe, cut to reveal the pyrene inside
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Pyrene of a peach dissected to reveal a single seed inside
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Pyrenes extracted from a single fruit of Crataegus punctata, a polypyrenous drupe
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X-ray of a pyrene of Elaeocarpus ganitrus revealing 10 seed-bearing locules inside; the number of locules in E. ganitrus pyrenes is variable between individual fruits